230033 Warren, J. F. (1981). The sulu zone, 1768-1898: The dynamic of external trade, slavery, and ethnicity in the transformation of a Southeast Asiam Maritime state. Singapore : Singapore Univ. Pr..
Chicago-viite (17. p.)230033 Warren, James Francis. The Sulu Zone, 1768-1898: The Dynamic of External Trade, Slavery, and Ethnicity in the Transformation of a Southeast Asiam Maritime State. Singapore : Singapore Univ. Pr., 1981.
MLA-viite (9. p.)230033 Warren, James Francis. The Sulu Zone, 1768-1898: The Dynamic of External Trade, Slavery, and Ethnicity in the Transformation of a Southeast Asiam Maritime State. Singapore : Singapore Univ. Pr., 1981.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.