Citação norma APA

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

Citação norma Chicago

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

Citação norma MLA

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

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.