Humphries, J. (1993). How to manage a sales team: A practical guide to sales leadership. Grolier International.
Citazione stile Chigago Style (17a edizione)Humphries, John. How to Manage a Sales Team: A Practical Guide to Sales Leadership. Hong Kong: Grolier International, 1993.
Citatione MLA (9a ed.)Humphries, John. How to Manage a Sales Team: A Practical Guide to Sales Leadership. Grolier International, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.