Chicago: George Wharton James, "Preface," The Grand Canyon of Arizona; How to See It, ed. Morris, Charles, 1833-1922 in The Grand Canyon of Arizona; How to See It Original Sources, accessed May 5, 2025, http://www.originalsources.com/Document.aspx?DocID=EQ3SIR726SHTK9N.
MLA: James, George Wharton. "Preface." The Grand Canyon of Arizona; How to See It, edited by Morris, Charles, 1833-1922, in The Grand Canyon of Arizona; How to See It, Original Sources. 5 May. 2025. http://www.originalsources.com/Document.aspx?DocID=EQ3SIR726SHTK9N.
Harvard: James, GW, 'Preface' in The Grand Canyon of Arizona; How to See It, ed. . cited in , The Grand Canyon of Arizona; How to See It. Original Sources, retrieved 5 May 2025, from http://www.originalsources.com/Document.aspx?DocID=EQ3SIR726SHTK9N.