diff --git a/alpine/flarectl/README.md b/alpine/flarectl/README.md
index 8c9cafd..286d8ce 100644
--- a/alpine/flarectl/README.md
+++ b/alpine/flarectl/README.md
@@ -1,4 +1,9 @@
 # Usage:
+```
 export CF_API_KEY=xxx
 export CF_API_EMAIL=yyy
 flarectl dns l --zone your-domain.com
+```
+
+# Reference:
+https://pkg.go.dev/github.com/cloudflare/cloudflare-go/cmd/flarectl#section-readme