Citazione Stile APA (7a Edizione)

Philippines (Republic). Board of Technical Surveys and Maps. Topographical Maps Division. (1966). Topographical maps: Descriptive folder. s.n.

Citazione stile Chigago Style (17a edizione)

Philippines (Republic). Board of Technical Surveys and Maps. Topographical Maps Division. Topographical Maps: Descriptive Folder. [Manila: s.n, 1966.

Citatione MLA (9a ed.)

Philippines (Republic). Board of Technical Surveys and Maps. Topographical Maps Division. Topographical Maps: Descriptive Folder. s.n, 1966.