Παραπομπή APA

Allen, R. Y., & Spohn, R. F. W. (1987). Selling Dynamics. McGraw-Hill.

Παραπομπή Chicago Style

Allen, Robert Y., και Robert F Wilson Spohn. Selling Dynamics. New York: McGraw-Hill, 1987.

Παραπομπή MLA

Allen, Robert Y., και Robert F Wilson Spohn. Selling Dynamics. McGraw-Hill, 1987.