diff --git a/README.md b/README.md
index d408e596b8be77233f6be418c954284042e64fe2..1047840d67d2bd82f458b57ddbde3abf1e47dc85 100644
--- a/README.md
+++ b/README.md
@@ -22,10 +22,12 @@ three.js에서 plane geometry를 가져와서 wire frame이 활성화 되어 있
 또한 수업시간에 배웠던 rotate box나 다른 코드들을 많이 참고하긴 했지만 처음부터 코드를 작성해보면서 어떻게 구성되어 있는지를 하나하나 찾아 볼 수 있었던 것 같아서 더 공부가 되었던 것 같다. 
 
 # 참조
-http://www.tcpschool.com/javascript/js_intro_basic-javascript
+http://www.tcpschool.com/javascript/js_intro_basic - javascript
+
+https://www.w3schools.com/howto/howto_js_rangeslider.asp - css(range slider),html,javascript
+
+https://threejs.org/docs/index.html#api/en/geometries/PlaneGeometry - three.js(PlaneGeometry)
 
-https://www.w3schools.com/howto/howto_js_rangeslider.asp-css(range slider),html,javascript
 
-https://threejs.org/docs/index.html#api/en/geometries/PlaneGeometry-three.js(PlaneGeometry)