Chicago:
R. M. Ballantyne, "Preface," The Coral Island, ed. Altemus, Henry in The Coral Island Original Sources, accessed August 30, 2025, http://originalsources.com/Document.aspx?DocID=TV67Z1E85U57GC5.
MLA:
Ballantyne, R. M. "Preface." The Coral Island, edited by Altemus, Henry, in The Coral Island, Original Sources. 30 Aug. 2025. http://originalsources.com/Document.aspx?DocID=TV67Z1E85U57GC5.
Harvard:
Ballantyne, RM, 'Preface' in The Coral Island, ed. . cited in , The Coral Island. Original Sources, retrieved 30 August 2025, from http://originalsources.com/Document.aspx?DocID=TV67Z1E85U57GC5.