Gaya APA

Chaffey, D., Ellis-Chadwick, F. (2015). DIGITAL MARKETING : STRATEGY, IMPLEMENTATION AND PRACTICE 6th EDITION (6). United Kingdom: Pearson Education.

Gaya MLA

Chaffey, Dave., Ellis-Chadwick, Fiona. "DIGITAL MARKETING : STRATEGY, IMPLEMENTATION AND PRACTICE 6th EDITION". 6 United Kingdom: Pearson Education, 2015. Text.