Heiman, S. E., Tuleja, T., & Sanchez, D. (2004). The new conceptual selling (2nd ed.). Warner Business Books, Kogan Page.
Chicago Style aipamenaHeiman, Stephen E., Tad Tuleja, and Diane Sanchez. The New Conceptual Selling. 2nd ed. New York, NY : India: Warner Business Books, Kogan Page, 2004.
MLA aipamenaHeiman, Stephen E., et al. The New Conceptual Selling. 2nd ed. Warner Business Books, Kogan Page, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.