Citazione Stile APA (7a Edizione)

Schiffman, S. (2008). The 25 sales habits of highly successful salespeople (3rd ed.). Adams Media.

Citazione stile Chigago Style (17a edizione)

Schiffman, Stephan. The 25 Sales Habits of Highly Successful Salespeople. 3rd ed. Avon, Mass.: Adams Media, 2008.

Citatione MLA (9a ed.)

Schiffman, Stephan. The 25 Sales Habits of Highly Successful Salespeople. 3rd ed. Adams Media, 2008.