APA (7th ed.) Citation

Sierra Club, Center for California Public Affairs, International Union for Conservation of Nature and Natural Resources, Trzyna, T. C., & Coan, E. V. (1976). World directory of environmental organizations (2nd ed.). Public Affairs Clearinghouse for the International Program of the Sierra Club.

Chicago Style (17th ed.) Citation

Sierra Club, Center for California Public Affairs, International Union for Conservation of Nature and Natural Resources, Thaddeus C. Trzyna, and Eugene V. Coan. World Directory of Environmental Organizations. 2nd ed. Claremont, Calif: Public Affairs Clearinghouse for the International Program of the Sierra Club, 1976.

MLA (9th ed.) Citation

Sierra Club, et al. World Directory of Environmental Organizations. 2nd ed. Public Affairs Clearinghouse for the International Program of the Sierra Club, 1976.