MLA

Grignion, Charles, 1721-1810, printmaker. [Frontispiece to The catalogue of pictures exhibited at Spring Gardens] [graphic]. published according to act of Parliament May 7, 1761.. https://collections.library.yale.edu/catalog/33191029.

APA, 6th edition

Grignion, Charles, 1721-1810, printmaker. (published according to act of Parliament May 7, 1761.)[[Frontispiece to The catalogue of pictures exhibited at Spring Gardens] [graphic]]. https://collections.library.yale.edu/catalog/33191029.