Futrell, C. (1999). Fundamentals of selling: Customers for life (6thed.). Irwin, McGraw-Hill.
Citazione stile Chigago Style (17a edizione)Futrell, Charles. Fundamentals of Selling: Customers for Life. 6thed. London: Irwin, McGraw-Hill, 1999.
Citatione MLA (9a ed.)Futrell, Charles. Fundamentals of Selling: Customers for Life. 6thed. Irwin, McGraw-Hill, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.