Gaya APA

Anggoro, A, S., Cockerell, L. (2013). The Customer Rules: The 39 Essential Rules For Delivering Sensational Service (-). New York: Profile Books.

Gaya MLA

Anggoro, Akmal, Sani., Cockerell, Lee. "The Customer Rules: The 39 Essential Rules For Delivering Sensational Service". - New York: Profile Books, 2013. Text.