Cita APA

Ehrlich, P. . R., & Ehrlich, A. H. (1970). Population resources environment. W.H. Freeman.

Citación estilo Chicago

Ehrlich, Paul R., and Anne H. Ehrlich. Population Resources Environment. Sanfrancisco: W.H. Freeman, 1970.

Cita MLA

Ehrlich, Paul R., and Anne H. Ehrlich. Population Resources Environment. W.H. Freeman, 1970.

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