Lua APA (7ú heag.)
ebrary, Inc, Krochalis, J., & Peters, E. (1982). The world of Piers Plowman. University of Pennsylvania Press.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, Jeanne Krochalis, agus Edward Peters. The World of Piers Plowman. Philadelphia: University of Pennsylvania Press, 1982.
Lua MLA (9ú heag.)
ebrary, Inc, et al. The World of Piers Plowman. University of Pennsylvania Press, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.