diff --git a/docs/features/trace_transcation.md b/docs/features/trace_transcation.md
index c25bf3a5d2..f8dc21134c 100644
--- a/docs/features/trace_transcation.md
+++ b/docs/features/trace_transcation.md
@@ -67,5 +67,5 @@ Response
 ```
 
 ## Reference
-- EVM  Tracing
-- Parity Trace Module
+- [EVM  Tracin](https://geth.ethereum.org/docs/developers/evm-tracing)
+- [Parity Trace Module](https://openethereum.github.io/JSONRPC-trace-module)