Todd, D. K. (1980). Groundwater hidrology (2a. ed.). John Wiley.
Chicago Style (17th ed.) ZitazioaTodd, David Keith. Groundwater Hidrology. 2a. ed. Nueva York: John Wiley, 1980.
MLA (9th ed.) ZitazioaTodd, David Keith. Groundwater Hidrology. 2a. ed. John Wiley, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.