Hariyono, R. (2003). ACTIVE ENGLISH CONVERSATION WITH EXERCISES. GitaMedia Press.
Lua i Stíl Chicago (17ú heag.)Hariyono, Rudy. ACTIVE ENGLISH CONVERSATION WITH EXERCISES. GitaMedia Press, 2003.
Lua MLA (8ú heag.)Hariyono, Rudy. ACTIVE ENGLISH CONVERSATION WITH EXERCISES. GitaMedia Press, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.