GARTSIDE, L. (1989). Model business letters.-- Ed.3. Binarupa Aksara.
芝加哥风格引文GARTSIDE, L. Model Business Letters.-- Ed.3. Jakarta: Binarupa Aksara, 1989.
MLA引文GARTSIDE, L. Model Business Letters.-- Ed.3. Binarupa Aksara, 1989.
警告:这些引文格式不一定是100%准确.