Siegfried, C. A. (1986). Understanding New York lakes. University of the State of New York, State Education Department, Biological Survey.
Cita Chicago (17th ed.)Siegfried, Clifford A. Understanding New York Lakes. Albany, N. Y: University of the State of New York, State Education Department, Biological Survey, 1986.
Cita MLA (9th ed.)Siegfried, Clifford A. Understanding New York Lakes. University of the State of New York, State Education Department, Biological Survey, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.