Cita APA (7th ed.)

ebrary, Inc, Krochalis, J., & Peters, E. (1982). The world of Piers Plowman. University of Pennsylvania Press.

Cita Chicago (17th ed.)

ebrary, Inc, Jeanne Krochalis, i Edward Peters. The World of Piers Plowman. Philadelphia: University of Pennsylvania Press, 1982.

Cita MLA (9th ed.)

ebrary, Inc, et al. The World of Piers Plowman. University of Pennsylvania Press, 1982.