Belgosa Business Communications & Pascual, R. J. (1997). Philippine regional profiles 1997. Belgosa Business Communications.
Chicagoスタイル(17版)引用形式Belgosa Business Communications , Ruben J. Pascual. Philippine Regional Profiles 1997. Makati City: Belgosa Business Communications, 1997.
MLA(9版)引用形式Belgosa Business Communications , Ruben J. Pascual. Philippine Regional Profiles 1997. Belgosa Business Communications, 1997.
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