Lua APA (7ú heag.)
Ehrlich, P. R., Ehrlich, A. H., & Holdren, J. P. (1977). Ecoscience: Population, resources, environment. W. H. Freeman.
Lua i Stíl Chicago (17ú heag.)
Ehrlich, Paul R., Anne H. Ehrlich, agus John P. Holdren. Ecoscience: Population, Resources, Environment. San Francisco: W. H. Freeman, 1977.
Lua MLA (9ú heag.)
Ehrlich, Paul R., et al. Ecoscience: Population, Resources, Environment. W. H. Freeman, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.