Serrano, B. L. (1999). Mindanao emerging as economic free. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Serrano, Ben L. "Mindanao Emerging as Economic Free." Philippine Star 1999.
Lua MLA (9ú heag.)Serrano, Ben L. "Mindanao Emerging as Economic Free." Philippine Star, 1999.
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