Numeroff, L. J., & McPhail, D. (2006). When sheep sleep. Abrams Books for Young Readers.
Lua i Stíl Chicago (17ú heag.)Numeroff, Laura Joffe, agus David McPhail. When Sheep Sleep. New York: Abrams Books for Young Readers, 2006.
Lua MLA (8ú heag.)Numeroff, Laura Joffe, agus David McPhail. When Sheep Sleep. Abrams Books for Young Readers, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.