APA

Etzel M. J., Bruce W. J. & William S. J. (2007). Marketing. Boston: McGraw-hill.

Chicago

Etzel Michael J, Bruce Walker J and William Stanton J. 2007. Marketing. Boston: McGraw-hill.

Harvard

Etzel M. J., Bruce W. J. and William S. J. (2007). Marketing. Boston: McGraw-hill.

MLA

Etzel Michael J, Bruce Walker J and William Stanton J. Marketing. Boston: McGraw-hill. 2007.