Chaffey, Dave Digital business and e-commerce management : strategy, implementation and practice / Dave Chaffey - 6th ed. - Harlow : Pearson, c2015. - xxxi, 680 p. : ill., maps. ; 27 cm. ISBN: 9780273786542 LCCN: Subjects--Topical Terms: Social sciencesResearchMethodology LC Class. No.: HF5548.32 / .C472 2015