Chaffey, Dave, 1963- Emarketing excellence : planning and optimizing your digital marketing / Dave Chaffey and PR Smith. - 4th ed. - London ; New York : Routledge, c2013. - xxiii, 613 p. : ill. (mostly col.) ; 26 cm. Includes bibliographical references and index. ISBN: 9780415533379 Subjects--Topical Terms: Internet marketing. LC Class. No.: HF5415.1265 / .S615 2013