APA (7th ed.) Citation

Salter, E. (1962). Piers plowman: An introduction. Harvard University Press.

Chicago Style (17th ed.) Citation

Salter, Elizabeth. Piers Plowman: An Introduction. Cambridge: Harvard University Press, 1962.

MLA (9th ed.) Citation

Salter, Elizabeth. Piers Plowman: An Introduction. Harvard University Press, 1962.