(1981). Estimating Numbers Of Terrestrial Birds/editor: C. John Ralph. A Cooper ornithological.
Chicago Style aipamenaEstimating Numbers Of Terrestrial Birds/editor: C. John Ralph. A Cooper ornithological, 1981.
MLA aipamenaEstimating Numbers Of Terrestrial Birds/editor: C. John Ralph. A Cooper ornithological, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.