Philippines (Republic). Board of Technical Surveys and Maps. (1960). Report on the status of surveying and mapping activities in the Philippines. s.n.].
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPhilippines (Republic). Board of Technical Surveys and Maps. Report on the Status of Surveying and Mapping Activities in the Philippines. [Manila: s.n.], 1960.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিPhilippines (Republic). Board of Technical Surveys and Maps. Report on the Status of Surveying and Mapping Activities in the Philippines. s.n.], 1960.
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