Gaya APA

Sudiyarto, O, H. et al (2007). Successful english for business : develop your speaking skill in the business (Ed.1, Cet.1). Yogyakarta: Andi.

Gaya MLA

Sudiyarto, Oktaviani, Hastu. et al. "Successful english for business : develop your speaking skill in the business". Ed.1, Cet.1 Yogyakarta: Andi, 2007. Text.