APA引文

Astroff, M. T. (1995). Conversation sales and services. U.S.A: Waterbury.

Trích dẫn kiểu Chicago

Astroff, Milton T. Conversation Sales and Services. U.S.A: Waterbury, 1995.

MLA引文

Astroff, Milton T. Conversation Sales and Services. U.S.A: Waterbury, 1995.

警告：這些引文格式不一定是100％准確.