APA引文
Ehrlich, P. R., Ehrlich, A. H., & Holdren, J. P. (1977). Ecoscience: Population, resources, environment. W. H. Freeman.
Chicago Style (17th ed.) Citation
Ehrlich, Paul R., Anne H. Ehrlich, and John P. Holdren. Ecoscience: Population, Resources, Environment. San Francisco: W. H. Freeman, 1977.
MLA引文
Ehrlich, Paul R., et al. Ecoscience: Population, Resources, Environment. W. H. Freeman, 1977.
警告：這些引文格式不一定是100％准確.