APA (7e ed.) Bronvermelding

Philippines. National Mapping and Resource Information Authority. Roxas City. National Mapping and Resource Information Authority, 1988.

Chicago (17e ed.) Bronvermelding

Philippines. National Mapping and Resource Information Authority. Roxas City. Makati, [Metro Manila]: National Mapping and Resource Information Authority, 1988.

MLA (9e ed.) Bronvermelding

Philippines. National Mapping and Resource Information Authority. Roxas City. National Mapping and Resource Information Authority, 1988.

Let op: Deze citaties zijn niet altijd 100% accuraat.