APA-čujuhus (7. p.)
Ehrlich, P. R., Ehrlich, A. H., & Holdren, J. P. (1977). Ecoscience: Population, resources, environment. W. H. Freeman.
Chicago-čujuhus (17. p.)
Ehrlich, Paul R., Anne H. Ehrlich, juo John P. Holdren. Ecoscience: Population, Resources, Environment. San Francisco: W. H. Freeman, 1977.
MLA-čujuhus (9. p.)
Ehrlich, Paul R., et al. Ecoscience: Population, Resources, Environment. W. H. Freeman, 1977.
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