[West Flanders] Petrus Koerius coelavit.
MLA
[West Flanders] Petrus Koerius Coelavit. 0AD. https://collections.library.yale.edu/catalog/15352347.
APA, 6th edition
[West Flanders] Petrus Koerius coelavit. (0 C.E.). [Maps]. https://collections.library.yale.edu/catalog/15352347.