Cite

[The impenetrable secret, a game each bearing a series of proverbs printed on both sides].

MLA

[The Impenetrable Secret, a Game Each Bearing a Series of Proverbs Printed on Both Sides]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/16737763.

APA, 6th edition

[The impenetrable secret, a game each bearing a series of proverbs printed on both sides]. (0 C.E.). [Puzzles]. publisher not identified. https://collections.library.yale.edu/catalog/16737763.