Cita APA (7th ed.)
Wagner, R. H. (1978). Man and the environment. (3rd ed.). W W Norton.
Cita Chicago (17th ed.)
Wagner, Richard H. Man and the Environment. 3rd ed. New York: W W Norton, 1978.
Cita MLA (9th ed.)
Wagner, Richard H. Man and the Environment. 3rd ed. W W Norton, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.