Chicago: Pliny the Younger, "Introduction.," Letters of the Younger Pliny, First Series— Volume 1, ed. Firth, John B. and trans. Mackail, J. W. (John William), 1859-1945 in Letters of the Younger Pliny, First Series—Volume 1 (New York: George E. Wood, ""Death-bed"" edition, 1892), Original Sources, accessed May 28, 2023, http://www.originalsources.com/Document.aspx?DocID=H4HXT8JBEYLHHQB.
MLA: Pliny the Younger. "Introduction." Letters of the Younger Pliny, First Series— Volume 1, edited by Firth, John B., and translated by Mackail, J. W. (John William), 1859-1945, in Letters of the Younger Pliny, First Series—Volume 1, New York, George E. Wood, ""Death-bed"" edition, 1892, Original Sources. 28 May. 2023. http://www.originalsources.com/Document.aspx?DocID=H4HXT8JBEYLHHQB.
Harvard: Pliny the Younger, 'Introduction.' in Letters of the Younger Pliny, First Series— Volume 1, ed. and trans. . cited in ""Death-bed"" edition, 1892, Letters of the Younger Pliny, First Series—Volume 1, George E. Wood, New York. Original Sources, retrieved 28 May 2023, from http://www.originalsources.com/Document.aspx?DocID=H4HXT8JBEYLHHQB.