Vol. 1: 2nd ed. (previous ed.: London: Longman, 1995); vol. 2: rev. ed. (previous ed.: Medieval Institute Publications, 2008).
v. 1. Text
v. 2. pt. 1. Introduction and textual notes
v. 2. pt. 2 Commentary, bibliography and indexical glossary.
Piers Plowman : a parallel-text edition of the A, B, C and Z versions by William Langland. ISBN 9781580441605. Published by Medieval Institute Publications in 2011. Publication and catalogue information, links to buy online and reader comments.