MLA

Cruikshank, Robert, 1789-1856, printmaker. Hans Buling, a mountebank of great notoriety who frequently exhibited in Covent Garden. From a Delft plate on the back of which are the initials B.S. 1750. [probably before 1820s]. https://collections.library.yale.edu/catalog/33463536.

APA, 6th edition

Cruikshank, Robert, 1789-1856, printmaker. ([probably before 1820s])[Hans Buling, a mountebank of great notoriety who frequently exhibited in Covent Garden. From a Delft plate on the back of which are the initials B.S. 1750]. https://collections.library.yale.edu/catalog/33463536.