Apps, J. W. (2005). Ringlingville USA: The stupendous story of seven siblings and their stunning circus success. Wisconsin Historical Society Press.
芝加哥风格引文Apps, Jerold W. Ringlingville USA: The Stupendous Story of Seven Siblings and Their Stunning Circus Success. Madison, Wis.: Wisconsin Historical Society Press, 2005.
MLA引文Apps, Jerold W. Ringlingville USA: The Stupendous Story of Seven Siblings and Their Stunning Circus Success. Wisconsin Historical Society Press, 2005.
警告：这些引文格式不一定是100％准确.