APA (7th ed.) Zitazioa
Krohne, D. T. (2001). General ecology (2nd ed.). Brooks/cole.
Chicago Style (17th ed.) Zitazioa
Krohne, David T. General Ecology. 2nd ed. Australia: Brooks/cole, 2001.
MLA (9th ed.) Zitazioa
Krohne, David T. General Ecology. 2nd ed. Brooks/cole, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.