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1
Digital marketing : strategy, implementation and practice / Dave Chaffey, Fiona Ellis-Chadwick.
Upper Saddle River : Pearson, 2016
xxvii, 702 p ; 27 cm.
2
Digital marketing : strategy, implementation and practice / Dave Chaffey, Fiona Ellis-Chadwick.
Harlow, England ; New York : Pearson, 2019
xxx, 545 p. : ill. (colour) ; 27 cm.