MLA

Entner, Franz, and playing card maker. [Uncut Sheet of 19th Century Czech Playing Cards]. Franz Entner, 0AD. https://collections.library.yale.edu/catalog/32249982.

APA, 6th edition

Entner, F., & playing card maker. (0 C.E.). [Uncut sheet of 19th century Czech playing cards]. [Specimens, Playing cards]. Franz Entner. https://collections.library.yale.edu/catalog/32249982.