Παραπομπή APA
Ridker, R. G. (1976). Population and development: The search for selective interventions. Baltimore: Published for Resources for the Future by the Johns Hopkins University Press.
Παραπομπή Chicago StyleRidker, Ronald Gene. Population and Development: The Search for Selective Interventions. Baltimore: Published for Resources for the Future by the Johns Hopkins University Press, 1976.
Παραπομπή MLARidker, Ronald Gene. Population and Development: The Search for Selective Interventions. Baltimore: Published for Resources for the Future by the Johns Hopkins University Press, 1976.
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