Cita APA (7a ed.)

Ernest, J. W., & Da Vall, G. M. (1959). Salesmanship fundamentals (2nd ed.). Gregg Division, MacGraw-Hill.

Cita Chicago Style (17a ed.)

Ernest, John W., y George M. Da Vall. Salesmanship Fundamentals. 2nd ed. New York [etc.]: Gregg Division, MacGraw-Hill, 1959.

Cita MLA (9a ed.)

Ernest, John W., y George M. Da Vall. Salesmanship Fundamentals. 2nd ed. Gregg Division, MacGraw-Hill, 1959.