Helson, Ravenna (1976). "Change, Tradition, and Critical Styles in the Contemporary World of Children's Books". Children's Literature. 5 (1): 22–39. doi:10.1353/chl.0.0757. S2CID144245771.
hbook.com
Horning, Kathleen T. (April 18, 2014), Spying on Louise Fitzhugh, Horn Book, archived from the original on April 22, 2016, retrieved April 12, 2016
illinois.edu
ideals.illinois.edu
Elleman, Barbara (1987). "Current Trends in Literature for Children"(PDF). Library Trends. 35 (3). Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign: 413–26. Archived from the original(PDF) on July 14, 2014. Retrieved March 17, 2013.
Helson, Ravenna (1976). "Change, Tradition, and Critical Styles in the Contemporary World of Children's Books". Children's Literature. 5 (1): 22–39. doi:10.1353/chl.0.0757. S2CID144245771.
web.archive.org
Horning, Kathleen T. (April 18, 2014), Spying on Louise Fitzhugh, Horn Book, archived from the original on April 22, 2016, retrieved April 12, 2016
Elleman, Barbara (1987). "Current Trends in Literature for Children"(PDF). Library Trends. 35 (3). Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign: 413–26. Archived from the original(PDF) on July 14, 2014. Retrieved March 17, 2013.