Gaya APA

CHA, D, A, B, S. et al (2006). Hotel Courtesy (Ed. I). Yogyakarta: C.V Andi Offset.

Gaya MLA

CHA, Drs., A., Bambang, Sujatno,. et al. "Hotel Courtesy". Ed. I Yogyakarta: C.V Andi Offset, 2006. Text.