APA Edition Citation

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

Chicago Edition Citation

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

MLA Edition Citation

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

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.