APA (7th ed.) Citation

Armstrong, G., & Kotler, P. (2009). Marketing: An introduction (9th ed.). Pearson Education.

Chicago Style (17th ed.) Citation

Armstrong, Gary, and Philip Kotler. Marketing: An Introduction. 9th ed. New jersey: Pearson Education, 2009.

MLA (9th ed.) Citation

Armstrong, Gary, and Philip Kotler. Marketing: An Introduction. 9th ed. Pearson Education, 2009.