APA引文

Beckwith, H. (1997). Selling the invisible: A field guide to modern marketing. New York: Warner.

Trích dẫn kiểu Chicago

Beckwith, Harry. Selling the Invisible: A Field Guide to Modern Marketing. New York: Warner, 1997.

MLA引文

Beckwith, Harry. Selling the Invisible: A Field Guide to Modern Marketing. New York: Warner, 1997.

警告：這些引文格式不一定是100％准確.