Chicago:
R. M. Ballantyne, "Preface," The Coral Island, ed. Altemus, Henry in The Coral Island Original Sources, accessed July 1, 2025, http://www.originalsources.com/Document.aspx?DocID=TV67Z1E85U57GC5.
MLA:
Ballantyne, R. M. "Preface." The Coral Island, edited by Altemus, Henry, in The Coral Island, Original Sources. 1 Jul. 2025. http://www.originalsources.com/Document.aspx?DocID=TV67Z1E85U57GC5.
Harvard:
Ballantyne, RM, 'Preface' in The Coral Island, ed. . cited in , The Coral Island. Original Sources, retrieved 1 July 2025, from http://www.originalsources.com/Document.aspx?DocID=TV67Z1E85U57GC5.