Henkes, K., & Yaccarino, D. (1998). Circle dogs. Greenwillow Books.
Lua i Stíl Chicago (17ú heag.)Henkes, Kevin, agus Dan Yaccarino. Circle Dogs. New York: Greenwillow Books, 1998.
Lua MLA (8ú heag.)Henkes, Kevin, agus Dan Yaccarino. Circle Dogs. Greenwillow Books, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.