Ridker, R. G. (1972). Population resources, and the environment. Government Printing Office.
Citación estilo ChicagoRidker, Ronald Gene. Population Resources, and the Environment. Washington, D.C: Government Printing Office, 1972.
Cita MLARidker, Ronald Gene. Population Resources, and the Environment. Government Printing Office, 1972.
Warning: These citations may not always be 100% accurate.