Belgosa Business Communications & Pascual, R. J. (1997). Philippine regional profiles 1997. Belgosa Business Communications.
Lua i Stíl Chicago (17ú heag.)Belgosa Business Communications agus Ruben J. Pascual. Philippine Regional Profiles 1997. Makati City: Belgosa Business Communications, 1997.
Lua MLA (9ú heag.)Belgosa Business Communications agus Ruben J. Pascual. Philippine Regional Profiles 1997. Belgosa Business Communications, 1997.
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