L. Frank Baum (2008). “7 Books in 1: L. Frank Baum's "Oz" Series, Volume 1 of 2. the Wonderful Wizard of Oz, the Marvelous Land of Oz, Ozma of Oz, Dorothy”, p.29, Shoes & Ships & Sealing Wax
L. Frank Baum (2008). “7 Books in 1: L. Frank Baum's "Oz" Series, Volume 1 of 2. the Wonderful Wizard of Oz, the Marvelous Land of Oz, Ozma of Oz, Dorothy”, p.24, Shoes & Ships & Sealing Wax
L. Frank Baum (2013). “Oz, the Complete Collection, Volume 1: The Wonderful Wizard of Oz; The Marvelous Land of Oz; Ozma of Oz”, p.36, Simon and Schuster
L. Frank Baum (2008). “8 Books in 1: L. Frank Baum's Original "Oz" Series, Volume 2 of 2. Little Wizard Stories of Oz, Tik-Tok of Oz, The Scarecrow Of Oz, Rinkitink In Oz, The Lost Prince”, p.232, Shoes & Ships & Sealing Wax
L. Frank Baum (2008). “7 Books in 1: L. Frank Baum's "Oz" Series, Volume 1 of 2. the Wonderful Wizard of Oz, the Marvelous Land of Oz, Ozma of Oz, Dorothy”, p.29, Shoes & Ships & Sealing Wax