Cita APA (7th ed.)

(1974). McGraw-Hill encyclopedia of environmental science. McGraw-Hill.

Cita Chicago (17th ed.)

McGraw-Hill Encyclopedia of Environmental Science. New York: McGraw-Hill, 1974.

Cita MLA (9th ed.)

McGraw-Hill Encyclopedia of Environmental Science. McGraw-Hill, 1974.

Atenció: Aquestes cites poden no estar 100% correctes.