Chicago: Henry John Coke, "Preface," Tracks of a Rolling Stone in Tracks of a Rolling Stone (New York: Grosset & Dunlap, 1903), Original Sources, accessed March 2, 2021, http://www.originalsources.com/Document.aspx?DocID=CY6PY61GVJDQEIJ.
MLA: Coke, Henry John. "Preface." Tracks of a Rolling Stone, in Tracks of a Rolling Stone, New York, Grosset & Dunlap, 1903, Original Sources. 2 Mar. 2021. www.originalsources.com/Document.aspx?DocID=CY6PY61GVJDQEIJ.
Harvard: Coke, HJ, 'Preface' in Tracks of a Rolling Stone. cited in 1903, Tracks of a Rolling Stone, Grosset & Dunlap, New York. Original Sources, retrieved 2 March 2021, from http://www.originalsources.com/Document.aspx?DocID=CY6PY61GVJDQEIJ.