Müller-Schwarze, D. (2011). The beaver: Its life and impact (2nd ed.). Comstock Pub. Associates.
Lua i Stíl Chicago (17ú heag.)Müller-Schwarze, Dietland. The Beaver: Its Life and Impact. 2nd ed. Ithaca: Comstock Pub. Associates, 2011.
Lua MLA (9ú heag.)Müller-Schwarze, Dietland. The Beaver: Its Life and Impact. 2nd ed. Comstock Pub. Associates, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.