MLA

Habeas Corpus! Ullman Mfg Co., 0AD. https://collections.library.yale.edu/catalog/32551014.

APA, 6th edition

Habeas corpus! (0 C.E.). [Humor, Caricatures and cartoons, Postcards]. Ullman Mfg Co. https://collections.library.yale.edu/catalog/32551014.