APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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