Morris, D. (1990). Animal watching: A field to animal behaviour. Jonathan Cape.
Chicago Style aipamenaMorris, Desmond. Animal Watching: A Field to Animal Behaviour. London: Jonathan Cape, 1990.
MLA aipamenaMorris, Desmond. Animal Watching: A Field to Animal Behaviour. Jonathan Cape, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.