Gaya APA

BEARDEN, W, O., INGRAM, T, N. (2001). Marketing: principles and perspectives (3rd. ed.). BOSTON: MCGRAW HILL-IRWIN.

Gaya MLA

BEARDEN, WILLIAM, O.., INGRAM, THOMAS, N.. "Marketing: principles and perspectives". 3rd. ed. BOSTON: MCGRAW HILL-IRWIN, 2001. Text.