Hariyono, R. (2003). ACTIVE ENGLISH CONVERSATION WITH EXERCISES. GitaMedia Press.
Chicago-viite (17. p.)Hariyono, Rudy. ACTIVE ENGLISH CONVERSATION WITH EXERCISES. GitaMedia Press, 2003.
MLA-viite (8. p.)Hariyono, Rudy. ACTIVE ENGLISH CONVERSATION WITH EXERCISES. GitaMedia Press, 2003.
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