Sax, J. L. (1971). Defending the environment: A strategy for citizen action. Alfred A Knopf.
Chicago Style aipamenaSax, Joseph L. Defending the Environment: A Strategy for Citizen Action. New York: Alfred A Knopf, 1971.
MLA aipamenaSax, Joseph L. Defending the Environment: A Strategy for Citizen Action. Alfred A Knopf, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.