Dumoulin, J. A., & Gray, J. E. (1997). Geologic studies in Alaska by the U.S. geological survey, 1995. U.S. G.P.O.
Cita Chicago (17th ed.)Dumoulin, Julie A., i John E. Gray. Geologic Studies in Alaska by the U.S. Geological Survey, 1995. Washington: U.S. G.P.O, 1997.
Cita MLA (9th ed.)Dumoulin, Julie A., i John E. Gray. Geologic Studies in Alaska by the U.S. Geological Survey, 1995. U.S. G.P.O, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.