Parker, G. H. Animal colours changes and their neurohumours. Cambridge university press.
Chicago Style aipamenaParker, George Howard. Animal Colours Changes and Their Neurohumours. Cambridge university press.
MLA aipamenaParker, George Howard. Animal Colours Changes and Their Neurohumours. Cambridge university press.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.