Godin, S. (2002). Purple Cow: Transform your Questions (NA.). Penguin Books.
Chicago Style (17th ed.) CitationGodin, Seth. Purple Cow: Transform Your Questions. NA. England: Penguin Books, 2002.
MLA (9th ed.) CitationGodin, Seth. Purple Cow: Transform Your Questions. NA. Penguin Books, 2002.
Warning: These citations may not always be 100% accurate.