Chaffey, Dave Digital business and E-commerce management : Strategy, implementation and practice / Dave Chaffey. - 6th ed. - Harlow : Pearson Education Limited, 2015. - xxxi, 680 p. : col. ill. ; 27 cm. ISBN: 9780273786542 Subjects--Topical Terms: E-commerce Dewey Class. No.: 658.872 / CHA