MLA

Letton, Thomas, and printmaker. To the Lovers of the Drama [Graphic]. Pub. May 23, 1781, for the proprieor T. Letton, by Mr. Picot, facing Hungerford Coffee House, Strand & Mr. Harris, Sweetings Alley, Cornhill, 0AD. https://collections.library.yale.edu/catalog/15809070.

APA, 6th edition

Letton, T., & printmaker. (0 C.E.). To the lovers of the drama [graphic] [Engravings England London 1781]. Pub. May 23, 1781, for the proprieor T. Letton, by Mr. Picot, facing Hungerford Coffee House, Strand & Mr. Harris, Sweetings Alley, Cornhill. https://collections.library.yale.edu/catalog/15809070.