Citazione Stile APA (7a Edizione)

(1971). Manila and suburbs flood control and drainage project: General map showing overall flood control and drainage scheme. [s.n.].

Citazione stile Chigago Style (17a edizione)

Manila and Suburbs Flood Control and Drainage Project: General Map Showing Overall Flood Control and Drainage Scheme. [Manila]: [s.n.], 1971.

Citatione MLA (9a ed.)

Manila and Suburbs Flood Control and Drainage Project: General Map Showing Overall Flood Control and Drainage Scheme. [s.n.], 1971.