Philippines. National Mapping & Resource Information Authority. Legazpi City. National Mapping and Resource Information Authority, 1989.
芝加哥风格引文Philippines. National Mapping & Resource Information Authority. Legazpi City. Makati, Metro Manila: National Mapping and Resource Information Authority, 1989.
MLA引文Philippines. National Mapping & Resource Information Authority. Legazpi City. National Mapping and Resource Information Authority, 1989.
警告:这些引文格式不一定是100%准确.