Gaya APA

Pramono, P, R., Sulistyo, U. (2007). 5 Giants Steps To Succesful Business Writing . Yogyakarta: Andi Offset.

Gaya MLA

Pramono, Peni, R.., Sulistyo, Ule. "5 Giants Steps To Succesful Business Writing". Yogyakarta: Andi Offset, 2007. Text.