APA (7th ed.) Citation

Gustafson, A. F. (1949). Conservation in the United States [by] A. F. Gustafson [and others] (3d ed.). Comstock Pub. Co..

Chicago Style (17th ed.) Citation

Gustafson, A. F. Conservation in the United States [by] A. F. Gustafson [and Others]. 3d ed. Ithaca, N.Y.: Comstock Pub. Co., 1949.

MLA (9th ed.) Citation

Gustafson, A. F. Conservation in the United States [by] A. F. Gustafson [and Others]. 3d ed. Comstock Pub. Co., 1949.