Henkes, K. (2008). Old Bear. Greenwillow Books.
Lua i Stíl Chicago (17ú heag.)Henkes, Kevin. Old Bear. New York: Greenwillow Books, 2008.
Lua MLA (8ú heag.)Henkes, Kevin. Old Bear. Greenwillow Books, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.