APA (7th ed.) Citation

Minnesota Environmental Sciences Foundation, Inc. Environmental Science Center, & National Wildlife Federation (U.S.). (1971). [Environmental discovery series]. National Wildlife Federation.

Chicago Style (17th ed.) Citation

Minnesota Environmental Sciences Foundation, Inc. Environmental Science Center, and National Wildlife Federation (U.S.). [Environmental Discovery Series]. Washington. D.C.: National Wildlife Federation, 1971.

MLA (8th ed.) Citation

Minnesota Environmental Sciences Foundation, Inc. Environmental Science Center, and National Wildlife Federation (U.S.). [Environmental Discovery Series]. National Wildlife Federation, 1971.