Cite

Horace Walpole, Earl of Orford [graphic]

MLA

Barlow, Inigo, and printmaker. Horace Walpole, Earl of Orford [Graphic]. R.H. Keynes, 0AD. https://collections.library.yale.edu/catalog/11134318.

APA, 6th edition

Barlow, I., & printmaker. (0 C.E.). Horace Walpole, Earl of Orford [graphic] [Portrait prints, Etchings England 1984, Engravings England 1984]. R.H. Keynes. https://collections.library.yale.edu/catalog/11134318.