Dyfyniad APA
Winter, T. C., Harey, J. W., Franke, O., & Alley, W. M. (1998). Ground Water And Suface Water A Single Resource: U.S.Geological Survey Circular 1139 (1st ed.). USGS.
Dyfyniad Arddull Chicago
Winter, Thomas C., Judson W. Harey, O.Lehn Franke, and William M. Alley. Ground Water And Suface Water A Single Resource: U.S.Geological Survey Circular 1139. 1st ed. New York: USGS, 1998.
Dyfyniad MLA
Winter, Thomas C., et al. Ground Water And Suface Water A Single Resource: U.S.Geological Survey Circular 1139. 1st ed. USGS, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.