APA ציטוט

Pursell, C. W. (1973). From conservation to ecology: The development of environmental concern. Crowell.

Chicago Style (17th ed.) Citation

Pursell, Carroll W. From Conservation to Ecology: The Development of Environmental Concern. New York: Crowell, 1973.

ציטוט MLA

Pursell, Carroll W. From Conservation to Ecology: The Development of Environmental Concern. Crowell, 1973.