Feine deutsche Karten
MLA
Grassau, J. F., and playing card maker. Feine Deutsche Karten. fabricirt bey J. F. Grassau, 0AD. https://collections.library.yale.edu/catalog/15959384.
APA, 6th edition
Grassau, J. F., & playing card maker. (0 C.E.). Feine deutsche Karten [Specimens, Early works to 1800, Playing cards]. fabricirt bey J. F. Grassau. https://collections.library.yale.edu/catalog/15959384.