MLA

Sommer, and playing card maker Seupke. German Suited Original Design Playing Cards Manufactured circa 1855, Dresden. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/17364293.

APA, 6th edition

S., & Seupke, playing card maker. (0 C.E.). German suited original design playing cards manufactured circa 1855, Dresden [Specimens, Playing cards, Tax stamps]. publisher not identified. https://collections.library.yale.edu/catalog/17364293.