Cite

Pretty, E.

MLA

Pettigrew, Thomas Joseph, 1791-1865. Pretty, E.. Box 19, folder 987. 1850-52. https://collections.library.yale.edu/catalog/16684186.

APA, 6th edition

Pettigrew, Thomas Joseph, 1791-1865. (["Box 19, folder 987"])(1850-52)[Pretty, E.]. https://collections.library.yale.edu/catalog/16684186.