Dyfyniad APA

 Chaffey, D. (2016).  Digital marketing: Strategy, Implementation and Practice.  Pearson.

Dyfyniad Arddull Chicago

 Chaffey, Dave.  Digital Marketing: Strategy, Implementation and Practice.  Pearson, 2016.

Dyfyniad MLA

 Chaffey, Dave.  Digital Marketing: Strategy, Implementation and Practice.  Pearson, 2016.

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