diff --git a/src/sage/combinat/designs/incidence_structures.py b/src/sage/combinat/designs/incidence_structures.py
index 5d622672e43..79c95d2c4fb 100644
--- a/src/sage/combinat/designs/incidence_structures.py
+++ b/src/sage/combinat/designs/incidence_structures.py
@@ -1810,7 +1810,7 @@ def dual(self, algorithm=None):
 
         REFERENCE:
 
-        - Soicher, Leonard, :gap_package:`Design package manual <design/htm/CHAP003.htm>`
+        - Leonard Soicher, :gap_package:`Design package manual <design/htm/CHAP003.htm>`
         """
         if algorithm == "gap":
             libgap.load_package("design")