Yancey, R. (2005). The extraordinary adventures of Alfred Kropp. Scholastic.
Lua i Stíl Chicago (17ú heag.)Yancey, Richard. The Extraordinary Adventures of Alfred Kropp. New York: Scholastic, 2005.
Lua MLA (9ú heag.)Yancey, Richard. The Extraordinary Adventures of Alfred Kropp. Scholastic, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.