Gaya APA

Pramono, P, R., Sulistyo, U. (2006). 5 Giant Steps, To Successfull Bussiness Writing (I). Yogyakarta: Andi.

Gaya MLA

Pramono, Peni, R., Sulistyo, Ule. "5 Giant Steps, To Successfull Bussiness Writing". I Yogyakarta: Andi, 2006. Text.