Cita APA

Etzel, M. J., & I. Walker, B. J. (1997). Marketing (11th ed.). Boston bIrwin : McGraw-Hill.

Citación estilo Chicago

Etzel, Michael J., y Bruce J. I. Walker. Marketing. 11th ed. Boston bIrwin : McGraw-Hill, 1997.

Cita MLA

Etzel, Michael J., y Bruce J. I. Walker. Marketing. 11th ed. Boston bIrwin : McGraw-Hill, 1997.