高悦. (2008). 角度决定高度: Level relys on points of view. 金城出版社.
Lua i Stíl Chicago (17ú heag.)高悦. 角度决定高度: Level Relys on Points of View. 金城出版社, 2008.
Lua MLA (8ú heag.)高悦. 角度决定高度: Level Relys on Points of View. 金城出版社, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.