MLA

Fowler, H., active 1768, printmaker. Caroline, Dutchess of Marlborough and her daughter Lady Caroline Spencer [graphic]. publish'd according to act of Parliament 20th Apr. 1768.. https://collections.library.yale.edu/catalog/16194756.

APA, 6th edition

Fowler, H., active 1768, printmaker. (publish'd according to act of Parliament 20th Apr. 1768.)[Caroline, Dutchess of Marlborough and her daughter Lady Caroline Spencer [graphic]]. https://collections.library.yale.edu/catalog/16194756.