Harr, M. E. (1991). Groundwater and seepage (1a. ed.). Dover.
Cita Chicago (17th ed.)Harr, Milton E. Groundwater and Seepage. 1a. ed. Nueva York: Dover, 1991.
Cita MLA (9th ed.)Harr, Milton E. Groundwater and Seepage. 1a. ed. Dover, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.