diff --git a/content/session/photocopying.md b/content/session/photocopying.md
index 30f95ef..f7a627c 100644
--- a/content/session/photocopying.md
+++ b/content/session/photocopying.md
@@ -43,6 +43,9 @@ Learners should access a photocopier and:
 # References:
 
 ![](bib:14c31baf-3e30-40d4-bc43-9e048c0cb762)
+
 ![](bib:19269815-12f5-4bd7-8540-ed130139a183)
+
 ![](bib:b79e8c67-f5be-47d0-8889-cbc5ec9ba517)
+
 ![](bib:f37521fa-8644-4ffa-b6b7-e47f94577e1d)
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