Heiman, S. E. (1999). New conceptual selling (2 edition.).
Citación estilo ChicagoHeiman, Stephen E. New Conceptual Selling. 2 edition. Warner Books, New York, 1999.
Cita MLAHeiman, Stephen E. New Conceptual Selling. 2 edition. 1999.
Warning: These citations may not always be 100% accurate.