Ackerman, E., & Hirner, D. (1996). Under The Bigtop with Schoenhuts Humpty Dumpty Circus. Gold Horse Publishing.
Lua i Stíl Chicago (17ú heag.)Ackerman, Evelyn, agus David Hirner. Under The Bigtop with Schoenhuts Humpty Dumpty Circus. Annapolis/Maryland: Gold Horse Publishing, 1996.
Lua MLA (8ú heag.)Ackerman, Evelyn, agus David Hirner. Under The Bigtop with Schoenhuts Humpty Dumpty Circus. Gold Horse Publishing, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.