Fox, M., & Argent, K. (1999). Sleepy bears (1st U.S. ed.). Harcourt Brace.
Lua i Stíl Chicago (17ú heag.)Fox, Mem, agus Kerry Argent. Sleepy Bears. 1st U.S. ed. San Diego: Harcourt Brace, 1999.
Lua MLA (8ú heag.)Fox, Mem, agus Kerry Argent. Sleepy Bears. 1st U.S. ed. Harcourt Brace, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.