Marshall, P. S. (2013). 80/20 sales and marketing: The definitive guide to working less and making more. Entrepreneur Press.
Chicago-Zitierstil (17. Ausg.)Marshall, Perry S. 80/20 Sales and Marketing: The Definitive Guide to Working Less and Making More. New York: Entrepreneur Press, 2013.
MLA-Zitierstil (9. Ausg.)Marshall, Perry S. 80/20 Sales and Marketing: The Definitive Guide to Working Less and Making More. Entrepreneur Press, 2013.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.