APA (7th ed.) Zitazioa
Ash, J. S., Atkins, J., Ash, C., & Shirihai, H. (2009). Birds of Ethiopia and Eritrea: An atlas of distribution. Christopher Helm.
Chicago Style (17th ed.) Zitazioa
Ash, J. S., John Atkins, Caroline Ash, eta Hadoram Shirihai. Birds of Ethiopia and Eritrea: An Atlas of Distribution. London: Christopher Helm, 2009.
MLA (9th ed.) Zitazioa
Ash, J. S., et al. Birds of Ethiopia and Eritrea: An Atlas of Distribution. Christopher Helm, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.