APA استشهاد

Gary, A., & Philip, K. (2008). Principles of marketing. Pearson Education.

استشهاد بنمط شيكاغو

Gary, Armstrong, و Kotler Philip. Principles of Marketing. New Delhi: Pearson Education, 2008.

MLA استشهاد

Gary, Armstrong, و Kotler Philip. Principles of Marketing. Pearson Education, 2008.