van der Valk, A. G. (2012). The biology of freshwater wetlands (2nd ed.). Oxford University Press.
Chicago Style aipamenavan der Valk, Arnold G. The Biology of Freshwater Wetlands. 2nd ed. Oxford: Oxford University Press, 2012.
MLA aipamenavan der Valk, Arnold G. The Biology of Freshwater Wetlands. 2nd ed. Oxford University Press, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.