KRISTIANTO, L. (1997). English for special purposes convertational approach Telephone. Visipro.
芝加哥风格引文KRISTIANTO, Lanny. English for Special Purposes Convertational Approach Telephone. Jakarta: Visipro, 1997.
MLA引文KRISTIANTO, Lanny. English for Special Purposes Convertational Approach Telephone. Visipro, 1997.
警告：这些引文格式不一定是100％准确.