Rutherford, D., & Knowles, J. (2008). Vulcans, earthlings and marketing ROI: Getting finance, marketing and advertising onto the same planet. Wilfrid Laurier University Press.

Rutherford, David, and Jonathan Knowles. Vulcans, Earthlings and Marketing ROI: Getting Finance, Marketing and Advertising onto the Same Planet. Waterloo, Ont.: Wilfrid Laurier University Press, 2008.

Rutherford, David, and Jonathan Knowles. Vulcans, Earthlings and Marketing ROI: Getting Finance, Marketing and Advertising onto the Same Planet. Wilfrid Laurier University Press, 2008.