Harden, L., & Heyman. (2011). Marketing by the numbers: How to measure and improve the ROI of any campaign. New York: American Management Association.
Chicago Style CitationHarden, Leland, and Heyman. Marketing By the Numbers: How to Measure and Improve the ROI of Any Campaign. New York: American Management Association, 2011.
MLA CitationHarden, Leland, and Heyman. Marketing By the Numbers: How to Measure and Improve the ROI of Any Campaign. New York: American Management Association, 2011.
Warning: These citations may not always be 100% accurate.