Gaya APA

Pramono, P, R., Sulistyo, U. (2007). 5 Giant Steps : To Successful Business Writing (cet.1.ed.1). YOGYAKARTA: ANDI.

Gaya MLA

Pramono, Peni, R., Sulistyo, Ule. "5 Giant Steps : To Successful Business Writing". cet.1.ed.1 YOGYAKARTA: ANDI, 2007. Text.