출처

http://blog.naver.com/alice0445/80135270896

http://blog.naver.com/royloo/220477576309

http://blog.naver.com/7019080/220419288930

http://cafe.naver.com/hanbatdesign/2290

http://navercast.naver.com/contents.nhn?rid=101&contents_id=5695

http://noamsaid.egloos.com/m/2177965

http://quietenough.tistory.com/category/%20_design/edtiorial