APA Style

Kotler, Philip, Armstrong, Gary. (2001). Principles of Marketing (19). New York: Prentice Hall.

Chicago Style

Kotler, Philip, Armstrong, Gary. Principles of Marketing. 19 New York: Prentice Hall, 2001. Text.

MLA Style

Kotler, Philip, Armstrong, Gary. Principles of Marketing. 19 New York: Prentice Hall, 2001. Text.

Turabian Style

Kotler, Philip, Armstrong, Gary. Principles of Marketing. 19 New York: Prentice Hall, 2001. Print.