(1972). Population and heirarchy of cities and municipalities: Bicol region. [s.n.].
Style de citation Chicago (17e éd.)Population and Heirarchy of Cities and Municipalities: Bicol Region. [Manila]: [s.n.], 1972.
Style de citation MLA (9e éd.)Population and Heirarchy of Cities and Municipalities: Bicol Region. [s.n.], 1972.
Attention : ces citations peuvent ne pas être correctes à 100%.