APA استشهاد

Poperch. Elizabeth. (1983). Product marketing. Cherbson publishing co.

استشهاد بنمط شيكاغو

Poperch. Elizabeth. Product Marketing. New York: Cherbson publishing co, 1983.

MLA استشهاد

Poperch. Elizabeth. Product Marketing. Cherbson publishing co, 1983.