^Holtz, Allan (2012). American Newspaper Comics: An Encyclopedic Reference Guide. Ann Arbor: The University of Michigan Press. p. 217. ISBN9780472117567.
^Ron Goulart. The Funnies:100 years of American comic strips. Holbrook, Mass. : Adams Pub., 1995. ISBN1558505393 (pp. 150, 218-19)
^Patrick Gaumer and Claude Moliterni, Dictionnaire Mondial de la Bande Dessinée, Paris : Larousse, 1997 ISBN9782035235107 (p. 353).