Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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