Gaya APA

inc., G, I., Humphries, J. (2003). Grolier business library How to manage a sales team. A practical guide to sales leadership . : grolier int'l.

Gaya MLA

inc., Grolier, International., Humphries, John. "Grolier business library How to manage a sales team. A practical guide to sales leadership". : grolier int'l, 2003. Text.