Παραπομπή APA

McDonald, W. J. (1998). Direct Marketing: An integrated approach. Irwin McGraw hill.

Παραπομπή Chicago Style

McDonald, William J. Direct Marketing: An Integrated Approach. New York: Irwin McGraw hill, 1998.

Παραπομπή MLA

McDonald, William J. Direct Marketing: An Integrated Approach. Irwin McGraw hill, 1998.