Piers the Plowman.
MLA
Langland, William, 1330?-1400?. Piers the Plowman.. [ca. 1550]. https://collections.library.yale.edu/catalog/16037448.
APA, 6th edition
Langland, William, 1330?-1400?. ([ca. 1550])[Piers the Plowman.]. https://collections.library.yale.edu/catalog/16037448.