design patterns - strategy pattern reference

Author: ruthetum

design-patterns/ch1-strategy/readme.md

@@ -9,4 +9,6 @@
 - 구현보다는 인터페이스에 맞춰서 프로그래밍한다.
 
 ## Reference
-- https://msyu1207.tistory.com/entry/1장-헤드퍼스트-디자인-패턴-전략-패턴
+- https://msyu1207.tistory.com/entry/1장-헤드퍼스트-디자인-패턴-전략-패턴
+- https://refactoring.guru/design-patterns/strategy
+- cache 정책을 strategy 패턴으로 : https://refactoring.guru/design-patterns/strategy/go/example