Cita APA (7a ed.)

Etzel Michael J., Bruce J. Walker, & William J. Stanton. Marketing (13th edition.). Tata McGraw hill.

Cita Chicago Style (17a ed.)

Etzel Michael J., Bruce J. Walker, y William J. Stanton. Marketing. 13th edition. New Delhi: Tata McGraw hill.

Cita MLA (9a ed.)

Etzel Michael J., et al. Marketing. 13th edition. Tata McGraw hill.