MLA

Rowlandson, Thomas, 1756-1827, printmaker. [Two men on horseback in front of an inn] [graphic] / Rowlandson.. Vol. 1 (Box 1 of 2) | Folder I-20. [n.d.]. https://collections.library.yale.edu/catalog/11791315.

APA, 6th edition

Rowlandson, Thomas, 1756-1827, printmaker. (["Vol. 1 (Box 1 of 2) | Folder I-20"])([n.d.])[[Two men on horseback in front of an inn] [graphic] / Rowlandson.]. https://collections.library.yale.edu/catalog/11791315.