Merlin's mechanical chair [graphic].
MLA
Merlin's Mechanical Chair [Graphic]. No.34 of R. Ackermann's Repository of Arts & c. Pub. Octr. 1, 1811, at 101 Strand London, 0AD. https://collections.library.yale.edu/catalog/17338656.
APA, 6th edition
Merlin's mechanical chair [graphic]. (0 C.E.). [Etchings, Aquatints]. No.34 of R. Ackermann's Repository of Arts & c. Pub. Octr. 1, 1811, at 101 Strand London. https://collections.library.yale.edu/catalog/17338656.