KRISTIANTO, L. (1997). English for special purposes convertational approach Telephone. Visipro.
Chicago-čujuhus (17. p.)KRISTIANTO, Lanny. English for Special Purposes Convertational Approach Telephone. Jakarta: Visipro, 1997.
MLA-čujuhus (9. p.)KRISTIANTO, Lanny. English for Special Purposes Convertational Approach Telephone. Visipro, 1997.
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