Cite

[Six vignettes illustrating letters M, N, O, P, Q, R] [graphic].

MLA

Heath, Henry, active 1824-1850, printmaker. [Six vignettes illustrating letters M, N, O, P, Q, R] [graphic].. [between 1825 and 1827?]. https://collections.library.yale.edu/catalog/10971563.

APA, 6th edition

Heath, Henry, active 1824-1850, printmaker. ([between 1825 and 1827?])[[Six vignettes illustrating letters M, N, O, P, Q, R] [graphic].]. https://collections.library.yale.edu/catalog/10971563.