APA (7th ed.) Citation

Harrah, D. F., & Harrah, B. K. (1975). Conservation/ecology, resources for environmental education. Scarecrow Press.

Chicago Style (17th ed.) Citation

Harrah, David F., and Barbara K. Harrah. Conservation/ecology, Resources for Environmental Education. Metuchen, N.J.: Scarecrow Press, 1975.

MLA (8th ed.) Citation

Harrah, David F., and Barbara K. Harrah. Conservation/ecology, Resources for Environmental Education. Scarecrow Press, 1975.