Philippines. National Mapping and Resource Information Authority. Dagupan City. National Mapping and Resource Information Authority, 1988.
Chicago-referens (17:e uppl.)Philippines. National Mapping and Resource Information Authority. Dagupan City. Makati, [Metro Manila]: National Mapping and Resource Information Authority, 1988.
MLA-referens (9:e uppl.)Philippines. National Mapping and Resource Information Authority. Dagupan City. National Mapping and Resource Information Authority, 1988.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.