APA (7th ed.) Citation

Leo, S. (2016). English for professional tour guiding services. Gramedia.

Chicago Style (17th ed.) Citation

Leo, Sutanto. English for Professional Tour Guiding Services. Gramedia, 2016.

MLA (8th ed.) Citation

Leo, Sutanto. English for Professional Tour Guiding Services. Gramedia, 2016.

Warning: These citations may not always be 100% accurate.