Gaya APA

Chaffey, D., Ellis-Chadwick, I. (2016). Digital Marketing 6nd Strategy, Implementation and Practice (Ed. 6). United Kingdom: Pearson Education Limited.

Gaya MLA

Chaffey, Dave., Ellis-Chadwick, Iona. "Digital Marketing 6nd Strategy, Implementation and Practice". Ed. 6 United Kingdom: Pearson Education Limited, 2016. E-Book.