diff --git a/README.md b/README.md
index 80de2b9..81761ec 100644
--- a/README.md
+++ b/README.md
@@ -55,3 +55,4 @@
 * [Practical Go by Dave Cheney](https://dave.cheney.net/practical-go/presentations/qcon-china.html)
 * [Less is exponentially more](https://commandcenter.blogspot.com/2012/06/less-is-exponentially-more.html)
 * [Getting to Go: The Journey of Go's Garbage Collector](https://blog.golang.org/ismmkeynote)
+* [Communicating Sequential Processes](./Communicating Sequential Processes.pdf)