Henkes, K. (1989). Shhhh. Greenwillow Books.
Lua i Stíl Chicago (17ú heag.)Henkes, Kevin. Shhhh. New York: Greenwillow Books, 1989.
Lua MLA (8ú heag.)Henkes, Kevin. Shhhh. Greenwillow Books, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.