Dyfyniad APA

(1972). Population and heirarchy of cities and municipalities: Bicol region. [s.n.].

Dyfyniad Arddull Chicago

Population and Heirarchy of Cities and Municipalities: Bicol Region. [Manila]: [s.n.], 1972.

Dyfyniad MLA

Population and Heirarchy of Cities and Municipalities: Bicol Region. [s.n.], 1972.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.