diff --git a/readme.md b/readme.md
index 3c2e2434cdedd0b0a38c0ebff2359eec542d6149..e1c345ec28ebfd3f3120fb54564e038bb73c1863 100644
--- a/readme.md
+++ b/readme.md
@@ -129,15 +129,15 @@ Direct3D면 몰라도 Three.js는 처음 사용하는 라이브러리이고 수
 **MIT License**  
 Copyright (c) 2022 Suhyeon Han
 
-## 소스 & 레퍼런스
+## 소스 & 참고문헌
 
-### 소스
+### 소스(참고용)
 * [Three.js webgl_depth_texture](https://github.com/mrdoob/three.js/blob/master/examples/webgl_depth_texture.html)
 * [Three.js webgl_postprocessing](https://github.com/mrdoob/three.js/blob/master/examples/webgl_postprocessing.html)
 * [Three.js webgl_postprocessing_unreal_bloom](https://github.com/mrdoob/three.js/blob/master/examples/webgl_postprocessing_unreal_bloom.html)
 * [Three.js webgl_postprocessing_godrays](https://github.com/mrdoob/three.js/blob/master/examples/webgl_postprocessing_godrays.html)
 
-### 레퍼런스
+### 참고문헌
 * Pope Kim. 셰이더 프로그래밍 입문. 한빛미디어, 2012
 * Feinstein, Doron. HLSL Development Cookbook. Packt, 2013
 * Dirksen, Jos. Learning Three.js - the JavaScript 3D Library for WebGL (Second Edition). Packt, 2015