APA (7th ed.) Zitazioa

Russell, F. (1988). Selling principles and practices. McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Russell, Frederic. Selling Principles and Practices. New York: McGraw-Hill, 1988.

MLA (9th ed.) Zitazioa

Russell, Frederic. Selling Principles and Practices. McGraw-Hill, 1988.