APA

Etzel M., Walker B. & Stanton W. (1997). Marketing. Boston: Irwin/McGraw-Hill.

Chicago

Etzel M.J, Walker B.J and Stanton W.J. 1997. Marketing. Boston: Irwin/McGraw-Hill.

Harvard

Etzel M., Walker B. and Stanton W. (1997). Marketing. Boston: Irwin/McGraw-Hill.

MLA

Etzel M.J, Walker B.J and Stanton W.J. Marketing. Boston: Irwin/McGraw-Hill. 1997.