Godin, Seth. Purple cow: Transform your business by being remarkable / Seth Godin. - New York : Portfolio, 2009. - 210 p. ; 18 cm. Includes index. ISBN: 9781591843177 LCCN: 2009035849 Subjects--Topical Terms: Marketing.Marketing--Case studies. LC Class. No.: HF5415 / .G578 2009 Dewey Class. No.: 658.8