Bears: Their Biology and Management. International Association for Bear Research and Management.
Lua i Stíl Chicago (17ú heag.)Bears: Their Biology and Management. International Association for Bear Research and Management.
Lua MLA (8ú heag.)Bears: Their Biology and Management. International Association for Bear Research and Management.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.