Cita APA (7a ed.)

Martin, W. B. (1993). Quality customer service (3rd ed.). Crisp Publications.

Cita Chicago Style (17a ed.)

Martin, William B. Quality Customer Service. 3rd ed. Menlo Park, Calif: Crisp Publications, 1993.

Cita MLA (9a ed.)

Martin, William B. Quality Customer Service. 3rd ed. Crisp Publications, 1993.