diff --git a/rules/gcp_k8s_rules/gcp_k8s_exec_into_pod.yml b/rules/gcp_k8s_rules/gcp_k8s_exec_into_pod.yml
index 29f00a269..be6b0f3f4 100644
--- a/rules/gcp_k8s_rules/gcp_k8s_exec_into_pod.yml
+++ b/rules/gcp_k8s_rules/gcp_k8s_exec_into_pod.yml
@@ -14,6 +14,7 @@ Description: >
   Alerts when users exec into pod. Possible to specify specific projects and allowed users.
 Runbook: >
   Investigate the user and determine why. Advise that it is discouraged practice. Create ticket if appropriate. 
+Reference: https://cloud.google.com/migrate/containers/docs/troubleshooting/executing-shell-commands
 Tests:
   -
     Name: Allowed User