APA (7th ed.) Citation

Eblen, R. A., & Eblen, W. R. (1994). The Encyclopedia of the environment. Houghton Mifflin Co..

Chicago Style (17th ed.) Citation

Eblen, Ruth A., and William R. Eblen. The Encyclopedia of the Environment. Boston: Houghton Mifflin Co., 1994.

MLA (9th ed.) Citation

Eblen, Ruth A., and William R. Eblen. The Encyclopedia of the Environment. Houghton Mifflin Co., 1994.