Cite

Mr. Ralph Marrowbone forming an obtuse angle [graphic]

MLA

Rowlandson, Thomas, 1756-1827, printmaker. Mr. Ralph Marrowbone forming an obtuse angle [graphic]. [1809?]. https://collections.library.yale.edu/catalog/10964497.

APA, 6th edition

Rowlandson, Thomas, 1756-1827, printmaker. ([1809?])[Mr. Ralph Marrowbone forming an obtuse angle [graphic]]. https://collections.library.yale.edu/catalog/10964497.