Marshall, P. S. (2016). 80/20 sales and marketing: The definitive guide to working less and making more = Jooser guide to 80/20 sales and marketing. Joosr Ltd.
Chicago-Zitierstil (17. Ausg.)Marshall, Perry S. 80/20 Sales and Marketing: The Definitive Guide to Working Less and Making More = Jooser Guide to 80/20 Sales and Marketing. Clitheroe, United Kingdom: Joosr Ltd, 2016.
MLA-Zitierstil (9. Ausg.)Marshall, Perry S. 80/20 Sales and Marketing: The Definitive Guide to Working Less and Making More = Jooser Guide to 80/20 Sales and Marketing. Joosr Ltd, 2016.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.