APA aipamena

Philippines. National Mapping and Resource Information Authority. (1990). Region I (Ed.1, November, 1989.). National Mapping and Resource Information Authority.

Chicago Style aipamena

Philippines. National Mapping and Resource Information Authority. Region I. Ed.1, November, 1989. Makati City: National Mapping and Resource Information Authority, 1990.

MLA aipamena

Philippines. National Mapping and Resource Information Authority. Region I. Ed.1, November, 1989. National Mapping and Resource Information Authority, 1990.