Gaya APA
Pride, W, M., Ferrell, O. (1989).
Marketing : Concepts and Strategies (Sixth . Ed.).
U.S.A.:
Houghton Mifflin Company.
Gaya MLA
Pride, William, M.., Ferrell, O.C..
"Marketing : Concepts and Strategies".
Sixth . Ed.
U.S.A.:
Houghton Mifflin Company,
1989.
Text.