Cite

Horace Walpole, Earl of Orford [realia]

MLA

Barlow, Inigo, and printmaker. Horace Walpole, Earl of Orford [Realia]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/11134319.

APA, 6th edition

Barlow, I., & printmaker. (0 C.E.). Horace Walpole, Earl of Orford [realia] [Portraits, Views, Printing plates]. publisher not identified. https://collections.library.yale.edu/catalog/11134319.