Cita APA (7th ed.)
McDonald, W. J. (1998). Direct marketing: An integrated approach. Irwin/McGraw-Hill.
Cita Chicago (17th ed.)
McDonald, William J. Direct Marketing: An Integrated Approach. Boston: Irwin/McGraw-Hill, 1998.
Cita MLA (9th ed.)
McDonald, William J. Direct Marketing: An Integrated Approach. Irwin/McGraw-Hill, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.