APA (7th ed.) Citation

Langland, W., Salter, E., & Pearsall, D. (1967). Piers Plowman. Edward Arnold.

Chicago Style (17th ed.) Citation

Langland, William, Elizabeth Salter, and Derek Pearsall. Piers Plowman. London: Edward Arnold, 1967.

MLA (8th ed.) Citation

Langland, William, et al. Piers Plowman. Edward Arnold, 1967.