diff --git a/sections/links.tex b/sections/links.tex
new file mode 100644
index 0000000..1be8745
--- /dev/null
+++ b/sections/links.tex
@@ -0,0 +1,20 @@
+\section{Rule number 6: links}
+\begin{frame}{Link referencing}
+    We can use Markdown link references by declaring a reference at the end of the mail body like this:
+
+    \begin{center}
+        \texttt{[1]: pweapon.org}
+    \end{center}\pause
+
+    Then I reference it like either this:
+
+    \begin{center}
+        \texttt{[Best hackerspace in Parma][1]}
+    \end{center}\pause
+
+    Or without brackets, like in scientific articles:
+
+    \begin{center}
+        \texttt{Best hackerspace in Parma [1]}
+    \end{center}
+\end{frame}
diff --git a/slides.tex b/slides.tex
index e0a9248..98377d1 100644
--- a/slides.tex
+++ b/slides.tex
@@ -26,6 +26,7 @@
     \input{sections/top-posting}
     \input{sections/line-wrap}
     \input{sections/forking}
+    \input{sections/links}
 
     \nocite{*}
     \bibliography{refs}