APA (7th ed.) Citation

Kotler, P., & Armstrong, G. (1994). Principles of marketing (6th ed.). Prentice-Hall.

Chicago Style (17th ed.) Citation

Kotler, Philip, and Gary Armstrong. Principles of Marketing. 6th ed. Englewood Cliffs, New Jersey: Prentice-Hall, 1994.

MLA (9th ed.) Citation

Kotler, Philip, and Gary Armstrong. Principles of Marketing. 6th ed. Prentice-Hall, 1994.