Cita APA (7th ed.)

Godin, S. (1999). Permission marketing: Strangers into friends into customers. Simon & Schuster.

Cita Chicago (17th ed.)

Godin, Seth. Permission Marketing: Strangers into Friends into Customers. London: Simon & Schuster, 1999.

Cita MLA (9th ed.)

Godin, Seth. Permission Marketing: Strangers into Friends into Customers. Simon & Schuster, 1999.