Gaya APA

LEO, Sutanto. (2016). English for professional tour guiding services . Jakarta: Gramedia Pustaka Utama.

Gaya Chicago

LEO, Sutanto. English for professional tour guiding services. Jakarta: Gramedia Pustaka Utama, 2016. Monograf.

Gaya MLA

LEO, Sutanto. English for professional tour guiding services. Jakarta: Gramedia Pustaka Utama, 2016. Monograf.

Gaya Turabian

LEO, Sutanto. English for professional tour guiding services. Jakarta: Gramedia Pustaka Utama, 2016. Monograf.