Παραπομπή APA

Sax, J. L. (1971). Defending the environment: A strategy for citizen action. Alfred A Knopf.

Παραπομπή Chicago Style

Sax, Joseph L. Defending the Environment: A Strategy for Citizen Action. New York: Alfred A Knopf, 1971.

Παραπομπή MLA

Sax, Joseph L. Defending the Environment: A Strategy for Citizen Action. Alfred A Knopf, 1971.