Cita APA (7th ed.)

Marks, R. B. (1997). Personal selling: A relationship approach (6th ed.). Prentice Hall.

Cita Chicago (17th ed.)

Marks, Ronald B. Personal Selling: A Relationship Approach. 6th ed. Upper Saddle River, N.J: Prentice Hall, 1997.

Cita MLA (9th ed.)

Marks, Ronald B. Personal Selling: A Relationship Approach. 6th ed. Prentice Hall, 1997.