APA (7e ed.) Bronvermelding

Orosa, S. Y. (1970). The Sulu archipelago and its people. New Mercury Print. Press.

Chicago (17e ed.) Bronvermelding

Orosa, Sixto Y. The Sulu Archipelago and Its People. New York: New Mercury Print. Press, 1970.

MLA (9e ed.) Bronvermelding

Orosa, Sixto Y. The Sulu Archipelago and Its People. New Mercury Print. Press, 1970.