"Notices of my appearances" (P 121)
MLA
Boswell, James, 1740-1795. "Notices of my appearances" (P 121). Box 64, folder 1336. 1790-92. https://collections.library.yale.edu/catalog/2039322.
APA, 6th edition
Boswell, James, 1740-1795. (["Box 64, folder 1336"])(1790-92)["Notices of my appearances" (P 121)]. https://collections.library.yale.edu/catalog/2039322.