Pullum, T. W. (1972). A comparison of recent Philippine fertility with the natural fertility model. Population Institute, University of the Philippines].
Cita Chicago (17th ed.)Pullum, Thomas W. A Comparison of Recent Philippine Fertility with the Natural Fertility Model. [Manila: Population Institute, University of the Philippines], 1972.
Cita MLA (9th ed.)Pullum, Thomas W. A Comparison of Recent Philippine Fertility with the Natural Fertility Model. Population Institute, University of the Philippines], 1972.
Atenció: Aquestes cites poden no estar 100% correctes.