Citazione Stile APA (7a Edizione)
Clay, J. (2003). Selling solutions: How to test, monitor and constantly improve your selling skills. Thorogood.
Citazione stile Chigago Style (17a edizione)
Clay, Julian. Selling Solutions: How to Test, Monitor and Constantly Improve Your Selling Skills. London: Thorogood, 2003.
Citatione MLA (9a ed.)
Clay, Julian. Selling Solutions: How to Test, Monitor and Constantly Improve Your Selling Skills. Thorogood, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.