MLA

Guillaume, de Deguileville, active 14th century. Le romant des trois pelerinaiges. after 1500]. https://collections.library.yale.edu/catalog/2013579.

APA, 6th edition

Guillaume, de Deguileville, active 14th century. (after 1500])[Le romant des trois pelerinaiges]. https://collections.library.yale.edu/catalog/2013579.