Dyfyniad APA

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

Dyfyniad Arddull Chicago

Godin, Seth. Permission Marketing: Turning Strangers into Friends, and Friends into Customers. New York: Simon & Schuster, 1999.

Dyfyniad MLA

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

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