Warren, J. F. (2000). The global economy and the Sulu zone: Connections, commodities and culture. New Day.
Lua i Stíl Chicago (17ú heag.)Warren, James Francis. The Global Economy and the Sulu Zone: Connections, Commodities and Culture. Quezon City: New Day, 2000.
Lua MLA (9ú heag.)Warren, James Francis. The Global Economy and the Sulu Zone: Connections, Commodities and Culture. New Day, 2000.
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