Cite

Wierd-sisters [sic], minister's of darkness, minions of the moon [graphic].

MLA

Gillray, James, 1756-1815, printmaker. Wierd-sisters [sic], minister's of darkness, minions of the moon [graphic].. [23 December 1791]. https://collections.library.yale.edu/catalog/10732682.

APA, 6th edition

Gillray, James, 1756-1815, printmaker. ([23 December 1791])[Wierd-sisters [sic], minister's of darkness, minions of the moon [graphic].]. https://collections.library.yale.edu/catalog/10732682.