Godin, S. (1999). Permission marketing: Strangers into friends into customers. Simon & Schuster.
Cita Chicago Style (17a ed.)Godin, Seth. Permission Marketing: Strangers into Friends into Customers. London: Simon & Schuster, 1999.
Cita MLA (9a ed.)Godin, Seth. Permission Marketing: Strangers into Friends into Customers. Simon & Schuster, 1999.
Precaución: Estas citas no son 100% exactas.