Chicago: H. G. Wells, "PREFACE," A Short History of the World Original Sources, accessed April 22, 2021, http://www.originalsources.com/Document.aspx?DocID=87GL9FRPXWMT9GA.
MLA: Wells, H. G. "PREFACE." A Short History of the World, Original Sources. 22 Apr. 2021. www.originalsources.com/Document.aspx?DocID=87GL9FRPXWMT9GA.
Harvard: Wells, HG 1922, 'PREFACE' in A Short History of the World. Original Sources, retrieved 22 April 2021, from http://www.originalsources.com/Document.aspx?DocID=87GL9FRPXWMT9GA.