Philippines. National Mapping and Resource Information Authority. El Nido. National Mapping and Resource Information Authority, 1988.
Chicago Style (17th ed.) CitationPhilippines. National Mapping and Resource Information Authority. El Nido. Makati, [Metro Manila]: National Mapping and Resource Information Authority, 1988.
MLA (9th ed.) CitationPhilippines. National Mapping and Resource Information Authority. El Nido. National Mapping and Resource Information Authority, 1988.
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