APA (7th ed.) Citation

Pernia, E. M. (1975). Regional divisions of the Philippines. University of the Philippines System, Population Institute.

Chicago Style (17th ed.) Citation

Pernia, Ernesto M. Regional Divisions of the Philippines. [Manila]: University of the Philippines System, Population Institute, 1975.

MLA (9th ed.) Citation

Pernia, Ernesto M. Regional Divisions of the Philippines. University of the Philippines System, Population Institute, 1975.

Warning: These citations may not always be 100% accurate.