Leo, S. (2009). English for Academic Purpose: Essay Writting/ 2009. Yogyakarta: Andi.
Lua i Stíl Chicago (17ú heag.)Leo, Sutanto. English for Academic Purpose: Essay Writting/ 2009. Yogyakarta: Andi, 2009.
Lua MLA (8ú heag.)Leo, Sutanto. English for Academic Purpose: Essay Writting/ 2009. Yogyakarta: Andi, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.