APA Style

Chaffey, D, 1., Ellis-Chadwick, F. (2016). Digital marketing : strategy, implementation and practice. Sixth Edition (Sixth Edition). Harlow: Pearson.

MLA Style

Chaffey, Dave,, 1963-., Ellis-Chadwick, Fiona. "Digital marketing : strategy, implementation and practice. Sixth Edition". Sixth Edition Harlow: Pearson, 2016. Text.