Philippines. National Mapping & Resource Information Authority. Legazpi City. National Mapping and Resource Information Authority, 1989.
Dyfyniad Arddull ChicagoPhilippines. National Mapping & Resource Information Authority. Legazpi City. Makati, Metro Manila: National Mapping and Resource Information Authority, 1989.
Dyfyniad MLAPhilippines. National Mapping & Resource Information Authority. Legazpi City. National Mapping and Resource Information Authority, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.