SUPONO, I. (1991). Business dialogues: Indonesian - English. Titik Terang.
Chicagoスタイル(17版)引用形式SUPONO, Idhie. Business Dialogues: Indonesian - English. Jakarta: Titik Terang, 1991.
MLA(9版)引用形式SUPONO, Idhie. Business Dialogues: Indonesian - English. Titik Terang, 1991.
警告: この引用は必ずしも正確ではありません.