Wigalois (fragment).
MLA
Wirnt, von Grafenberg, active 13th century. Wigalois (fragment).. [between 1240 and 1260].. https://collections.library.yale.edu/catalog/2003694.
APA, 6th edition
Wirnt, von Grafenberg, active 13th century. ([between 1240 and 1260].)[Wigalois (fragment).]. https://collections.library.yale.edu/catalog/2003694.