MLA

Mrs. G-s Sir Timothy Tallboy. [Graphic]. Published by A. Hamilton Junr., near St. John's Gate, 1AD. https://collections.library.yale.edu/catalog/10716290.

APA, 6th edition

Mrs. G-s Sir Timothy Tallboy. [graphic]. (1 C.E.). [Portrait prints, Periodical illustrations, Stipple engravings England London 1774, Etchings England London 1774]. Published by A. Hamilton Junr., near St. John's Gate. https://collections.library.yale.edu/catalog/10716290.