APA (7th ed.) Citation

Emmel, T. C. (1973). An introduction to ecology and population biology. W.W. Norton.

Chicago Style (17th ed.) Citation

Emmel, Thomas C. An Introduction to Ecology and Population Biology. New York: W.W. Norton, 1973.

MLA (9th ed.) Citation

Emmel, Thomas C. An Introduction to Ecology and Population Biology. W.W. Norton, 1973.