APA (7th ed.) Citation

Godin, S. (2005). Purple cow: Transform your business by being remarkable. Penguin Books.

Chicago Style (17th ed.) Citation

Godin, Seth. Purple Cow: Transform Your Business by Being Remarkable. New York: Penguin Books, 2005.

MLA (9th ed.) Citation

Godin, Seth. Purple Cow: Transform Your Business by Being Remarkable. Penguin Books, 2005.

Warning: These citations may not always be 100% accurate.