Gaya APA

Cholil, M., Soenarno, A. (2014). Complain topedia : the art of complaint handling (Ed.1). Yogyakarta: Andi.

Gaya MLA

Cholil, Mohammad., Soenarno, Adi. "Complain topedia : the art of complaint handling". Ed.1 Yogyakarta: Andi, 2014. Text.