Hedenborg, S.; White, M. H. (2012). "Changes and variations in patterns of gender relations in equestrian sports during the second half of the twentieth century". Sport in Society. 15 (3): 302–319. doi:10.1080/17430437.2012.653202.
Price, Steven D.; Rentsch, Gail; Burn, Barbara; Spector, David A. (1998). The Whole Horse Catalog. New York: Simon and Schuster. p. 329. ISBN0684839954. OL377573M.