Gaya APA

S.PD, M, M, B. (1997). ENGLISH FOR STUDENTS OF BUSINESS . YOGYAKARTA: UPP AMP YKPN.

Gaya MLA

S.PD, MAHMUD, MACHFOEDZ,, B.A.,. "ENGLISH FOR STUDENTS OF BUSINESS". YOGYAKARTA: UPP AMP YKPN, 1997. Text.