APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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