APA aipamena

Kotler, P. (1991). Principles of marketing (5th.). Prentice Hall.

Chicago Style aipamena

Kotler, Philip. Principles of Marketing. 5th. New Delhi: Prentice Hall, 1991.

MLA aipamena

Kotler, Philip. Principles of Marketing. 5th. Prentice Hall, 1991.