Gaya APA

ETZEL, M, J., STANTON, W, J. (2004). Marketing (13th.ed.). BOSTON: MCGRAW HILL-IRWIN.

Gaya MLA

ETZEL, MICHAEL, J.., STANTON, WILLIAM, J.. "Marketing". 13th.ed. BOSTON: MCGRAW HILL-IRWIN, 2004. Text.