"Based on a detailed study of the Year books of the first half of the 14th century." -Author's pref, "Originally presented, i. s. f., & Plucknett, T. F. T. (1922). Statutes and their interpretation in the first half of the fourteenth century. University Press.
Chicago Style (17th ed.) Citation"Based on a detailed study of the Year books of the first half of the 14th century." -Author's pref, in smaller form "Originally presented, and Theodore Frank Thomas Plucknett. Statutes and Their Interpretation in the First Half of the Fourteenth Century. Cambridge: University Press, 1922.
MLA (9th ed.) Citation"Based on a detailed study of the Year books of the first half of the 14th century." -Author's pref, et al. Statutes and Their Interpretation in the First Half of the Fourteenth Century. University Press, 1922.