Cita APA (7th ed.)

U.S. Board on Geographical Names & U.S. Army Map Service. A.M.S. S401. (1944). Gazetteer to maps of the Philippine Islands, map series AMS S401 scale 1: 500,000. Army Map Service.

Cita Chicago (17th ed.)

U.S. Board on Geographical Names i U.S. Army Map Service. A.M.S. S401. Gazetteer to Maps of the Philippine Islands, Map Series AMS S401 Scale 1: 500,000. Washington: Army Map Service, 1944.

Cita MLA (9th ed.)

U.S. Board on Geographical Names i U.S. Army Map Service. A.M.S. S401. Gazetteer to Maps of the Philippine Islands, Map Series AMS S401 Scale 1: 500,000. Army Map Service, 1944.