APA (7th ed.) Zitazioa
Knapp, B. J. (1979). Elements of geographical hydrology. Allen & Unwin.
Chicago Style (17th ed.) Zitazioa
Knapp, Brian J. Elements of Geographical Hydrology. London ; Boston: Allen & Unwin, 1979.
MLA (9th ed.) Zitazioa
Knapp, Brian J. Elements of Geographical Hydrology. Allen & Unwin, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.