Philippines. National Mapping and Resource Information Authority. Puerto Princesa. National Mapping and Resource Information Authority, 1975.
Cita Chicago (17th ed.)Philippines. National Mapping and Resource Information Authority. Puerto Princesa. Makati, Metro Manila: National Mapping and Resource Information Authority, 1975.
Cita MLA (9th ed.)Philippines. National Mapping and Resource Information Authority. Puerto Princesa. National Mapping and Resource Information Authority, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.