Lua APA (7ú heag.)

KRISTIANTO, L. (1997). English for special purposes convertational approach Telephone. Visipro.

Lua i Stíl Chicago (17ú heag.)

KRISTIANTO, Lanny. English for Special Purposes Convertational Approach Telephone. Jakarta: Visipro, 1997.

Lua MLA (9ú heag.)

KRISTIANTO, Lanny. English for Special Purposes Convertational Approach Telephone. Visipro, 1997.

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