diff --git a/src/cffconvert/lib/cff_1_0_x/apalike.py b/src/cffconvert/lib/cff_1_0_x/apalike.py
index a94f499d..c7f93f60 100644
--- a/src/cffconvert/lib/cff_1_0_x/apalike.py
+++ b/src/cffconvert/lib/cff_1_0_x/apalike.py
@@ -16,12 +16,14 @@ def add_author(self):
         authors_apalike = [ApalikeAuthor(a).as_string() for a in authors_cff]
         authors_apalike_filtered = [a for a in authors_apalike if a is not None]
         n_authors = len(authors_apalike_filtered)
-        if n_authors > 2:
-            self.author = ", ".join(authors_apalike_filtered[:-1]) + ", and " + authors_apalike_filtered[-1]
-        if n_authors == 2:
-            self.author = ", ".join(authors_apalike_filtered[:-1]) + " and " + authors_apalike_filtered[-1]
-        if n_authors == 1:
+        if n_authors < 1:
+            pass
+        elif n_authors == 1:
             self.author = ", ".join(authors_apalike_filtered)
+        elif n_authors == 2:
+            self.author = ", ".join(authors_apalike_filtered[:-1]) + " and " + authors_apalike_filtered[-1]
+        else:
+            self.author = ", ".join(authors_apalike_filtered[:-1]) + ", and " + authors_apalike_filtered[-1]
         return self
 
     def add_year(self):
diff --git a/src/cffconvert/lib/cff_1_1_x/apalike.py b/src/cffconvert/lib/cff_1_1_x/apalike.py
index cae1f3ba..7a6cf3a0 100644
--- a/src/cffconvert/lib/cff_1_1_x/apalike.py
+++ b/src/cffconvert/lib/cff_1_1_x/apalike.py
@@ -14,12 +14,14 @@ def add_author(self):
         authors_apalike = [ApalikeAuthor(a).as_string() for a in authors_cff]
         authors_apalike_filtered = [a for a in authors_apalike if a is not None]
         n_authors = len(authors_apalike_filtered)
-        if n_authors > 2:
-            self.author = ", ".join(authors_apalike_filtered[:-1]) + ", and " + authors_apalike_filtered[-1]
-        if n_authors == 2:
-            self.author = ", ".join(authors_apalike_filtered[:-1]) + " and " + authors_apalike_filtered[-1]
-        if n_authors == 1:
+        if n_authors < 1:
+            pass
+        elif n_authors == 1:
             self.author = ", ".join(authors_apalike_filtered)
+        elif n_authors == 2:
+            self.author = ", ".join(authors_apalike_filtered[:-1]) + " and " + authors_apalike_filtered[-1]
+        else:
+            self.author = ", ".join(authors_apalike_filtered[:-1]) + ", and " + authors_apalike_filtered[-1]
         return self
 
     def add_year(self):
diff --git a/src/cffconvert/lib/cff_1_2_x/apalike.py b/src/cffconvert/lib/cff_1_2_x/apalike.py
index 3965ec1b..8951119b 100644
--- a/src/cffconvert/lib/cff_1_2_x/apalike.py
+++ b/src/cffconvert/lib/cff_1_2_x/apalike.py
@@ -14,12 +14,14 @@ def add_author(self):
         authors_apalike = [ApalikeAuthor(a).as_string() for a in authors_cff]
         authors_apalike_filtered = [a for a in authors_apalike if a is not None]
         n_authors = len(authors_apalike_filtered)
-        if n_authors > 2:
-            self.author = ", ".join(authors_apalike_filtered[:-1]) + ", and " + authors_apalike_filtered[-1]
-        if n_authors == 2:
-            self.author = ", ".join(authors_apalike_filtered[:-1]) + " and " + authors_apalike_filtered[-1]
-        if n_authors == 1:
+        if n_authors < 1:
+            pass
+        elif n_authors == 1:
             self.author = ", ".join(authors_apalike_filtered)
+        elif n_authors == 2:
+            self.author = ", ".join(authors_apalike_filtered[:-1]) + " and " + authors_apalike_filtered[-1]
+        else:
+            self.author = ", ".join(authors_apalike_filtered[:-1]) + ", and " + authors_apalike_filtered[-1]
         return self
 
     def add_year(self):
diff --git a/src/cffconvert/lib/cff_1_3_x/apalike.py b/src/cffconvert/lib/cff_1_3_x/apalike.py
index ce99135e..83514558 100644
--- a/src/cffconvert/lib/cff_1_3_x/apalike.py
+++ b/src/cffconvert/lib/cff_1_3_x/apalike.py
@@ -14,12 +14,14 @@ def add_author(self):
         authors_apalike = [ApalikeAuthor(a).as_string() for a in authors_cff]
         authors_apalike_filtered = [a for a in authors_apalike if a is not None]
         n_authors = len(authors_apalike_filtered)
-        if n_authors > 2:
-            self.author = ", ".join(authors_apalike_filtered[:-1]) + ", and " + authors_apalike_filtered[-1]
-        if n_authors == 2:
-            self.author = ", ".join(authors_apalike_filtered[:-1]) + " and " + authors_apalike_filtered[-1]
-        if n_authors == 1:
+        if n_authors < 1:
+            pass
+        elif n_authors == 1:
             self.author = ", ".join(authors_apalike_filtered)
+        elif n_authors == 2:
+            self.author = ", ".join(authors_apalike_filtered[:-1]) + " and " + authors_apalike_filtered[-1]
+        else:
+            self.author = ", ".join(authors_apalike_filtered[:-1]) + ", and " + authors_apalike_filtered[-1]
         return self
 
     def add_year(self):