Gaya APA

Chaffey, D., Ellis-Chadwick, F. (2016). Digital Marketing: Strategy, Implementation and Practice Sixth Edition (Sixth). United Kingdom: Pearson.

Gaya MLA

Chaffey, Dave., Ellis-Chadwick, Fiona. "Digital Marketing: Strategy, Implementation and Practice Sixth Edition". Sixth United Kingdom: Pearson, 2016. .