Stokes, Richard L. Ultimate guide to pay-per-click advertising / - United States : Entrepreneur Media, Inc., c2010. - 324 p. : ill. ; 5 cm. Includes index. ISBN: 15991863633 Subjects--Topical Terms: 1. Internet marketing. 2. Internet advertising. Dewey Class. No.: Circ. 659.144 S874u 2010