APA استشهاد

Kotler,Philip, & Armstrong, G. (2008). Principles of marketing (12nd ed.). Pearson Education.

استشهاد بنمط شيكاغو

Kotler,Philip, و Gray Armstrong. Principles of Marketing. 12nd ed. New Delhi: Pearson Education, 2008.

MLA استشهاد

Kotler,Philip, و Gray Armstrong. Principles of Marketing. 12nd ed. Pearson Education, 2008.