(1970). [Philippines ...] (ed.1 BTSM (1. pr. 1961), repr.). Board of Technical Surveys and Maps.
Chicago Style (17th ed.) Citation[Philippines ...]. ed.1 BTSM (1. pr. 1961), repr. Manila: Board of Technical Surveys and Maps, 1970.
MLA (9th ed.) Citation[Philippines ...]. ed.1 BTSM (1. pr. 1961), repr. Board of Technical Surveys and Maps, 1970.
Warning: These citations may not always be 100% accurate.