Philippines. National Mapping and Resource Information Authority. Roxas City. National Mapping and Resource Information Authority, 1988.
Παραπομπή σε μορφή Chicago (17η εκδ.)Philippines. National Mapping and Resource Information Authority. Roxas City. Makati, [Metro Manila]: National Mapping and Resource Information Authority, 1988.
Παραπομπή σε μορφή MLA (9th εκδ.)Philippines. National Mapping and Resource Information Authority. Roxas City. National Mapping and Resource Information Authority, 1988.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.