Gaya APA

Sulistyo, U., Setyarini, S. (2007). Succesful English For Business: Develop your Speaking Skill in the Business (I). Yogyakarta: Andi.

Gaya MLA

Sulistyo, Ule., Setyarini, Susana. "Succesful English For Business: Develop your Speaking Skill in the Business". I Yogyakarta: Andi, 2007. Text.