Citazione Stile APA (7a Edizione)

Harden, L., & Heyman, B. (2011). Marketing by the numbers: How to measure and improve the ROI of any campaign. Amacon.

Citazione stile Chigago Style (17a edizione)

Harden, Leland, e Bob Heyman. Marketing by the Numbers: How to Measure and Improve the ROI of Any Campaign. New York: Amacon, 2011.

Citatione MLA (9a ed.)

Harden, Leland, e Bob Heyman. Marketing by the Numbers: How to Measure and Improve the ROI of Any Campaign. Amacon, 2011.