Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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