Gaya APA

Ellis-Chadwick, D, C, F. (2016). "Digital Marketing: Strategy, Implementation and Practice| (6th edition). Harlow: Pearson.

Gaya MLA

Ellis-Chadwick, Dave, Chaffey,, Fiona. ""Digital Marketing: Strategy, Implementation and Practice|". 6th edition Harlow: Pearson, 2016. book.