Gaya APA

LEO, S. (2001). English for Proffesional Accomodation Services (cet. 1). Jakarta: Gramedia Pustaka Utama.

Gaya MLA

LEO, Sutanto. "English for Proffesional Accomodation Services". cet. 1 Jakarta: Gramedia Pustaka Utama, 2001. Text.