Apps, J. W. (2005). Ringlingville USA: The stupendous story of seven siblings and their stunning circus success. Wisconsin Historical Society Press.
Lua i Stíl Chicago (17ú heag.)Apps, Jerold W. Ringlingville USA: The Stupendous Story of Seven Siblings and Their Stunning Circus Success. Madison, Wis.: Wisconsin Historical Society Press, 2005.
Lua MLA (9ú heag.)Apps, Jerold W. Ringlingville USA: The Stupendous Story of Seven Siblings and Their Stunning Circus Success. Wisconsin Historical Society Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.