Cite

[Collection of pictorial conundrum cards] [graphic].

MLA

[Collection of Pictorial Conundrum Cards] [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/33113909.

APA, 6th edition

[Collection of pictorial conundrum cards] [graphic]. (0 C.E.). [Specimens, Playing cards, Game cards, Riddles, Caricatures, Etchings, Wash drawings]. publisher not identified. https://collections.library.yale.edu/catalog/33113909.