Maass, A. (1974). Muddy waters; the Army Engineers and the Nation's rivers. Da Capo Press.
Cita Chicago (17th ed.)Maass, Arthur. Muddy Waters; the Army Engineers and the Nation's Rivers. New York: Da Capo Press, 1974.
Cita MLA (9th ed.)Maass, Arthur. Muddy Waters; the Army Engineers and the Nation's Rivers. Da Capo Press, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.