diff --git a/book/references.bib b/book/references.bib
index 79e2b1e..6b03119 100644
--- a/book/references.bib
+++ b/book/references.bib
@@ -212,7 +212,7 @@
   title = {The logo of TeachBooks.},
   year = {2024},
   date = {2024-11-13},
-  note = {License: CC-BY},
+  note = {License: CC BY},
   url = {https://github.com/TeachBooks/logos_and_visualisations},
   howpublished = {\url{https://github.com/TeachBooks/logos_and_visualisations}},
   copyright = {© TeachBooks 2024}