Gregory, k. J. (1977). River channel changes. John Wiley.
Cita Chicago (17th ed.)Gregory, k. J. River Channel Changes. New York: John Wiley, 1977.
Cita MLA (9th ed.)Gregory, k. J. River Channel Changes. John Wiley, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.