Chicago: L. Frank Baum, "Author’s Note," The Marvelous Land of Oz, ed. Altemus, Henry in The Marvelous Land of Oz Original Sources, accessed February 7, 2023, http://www.originalsources.com/Document.aspx?DocID=NP6GA9L4Y5T4D63.
MLA: Baum, L. Frank. "Author’s Note." The Marvelous Land of Oz, edited by Altemus, Henry, in The Marvelous Land of Oz, Original Sources. 7 Feb. 2023. http://www.originalsources.com/Document.aspx?DocID=NP6GA9L4Y5T4D63.
Harvard: Baum, LF, 'Author’s Note' in The Marvelous Land of Oz, ed. . cited in , The Marvelous Land of Oz. Original Sources, retrieved 7 February 2023, from http://www.originalsources.com/Document.aspx?DocID=NP6GA9L4Y5T4D63.