APA استشهاد

Poperch, E. (1982). Product marketing. Cherbson publishing co.

استشهاد بنمط شيكاغو

Poperch, Elizabeth. Product Marketing. New York: Cherbson publishing co, 1982.

MLA استشهاد

Poperch, Elizabeth. Product Marketing. Cherbson publishing co, 1982.