MLA

Strong, 19th century, printmaker. A characteristic group, representing Chang and Eng, the Siamese twins, with their wives and children [graphic]. [19 March 1853]. https://collections.library.yale.edu/catalog/17339635.

APA, 6th edition

Strong, 19th century, printmaker. ([19 March 1853])[A characteristic group, representing Chang and Eng, the Siamese twins, with their wives and children [graphic]]. https://collections.library.yale.edu/catalog/17339635.