Chatham, William Pitt, 1st E. of (C 785-786)
MLA
Boswell, James, 1740-1795. Chatham, William Pitt, 1st E. of (C 785-786). Box 19, folder 428. 1766-67. https://collections.library.yale.edu/catalog/2038760.
APA, 6th edition
Boswell, James, 1740-1795. (["Box 19, folder 428"])(1766-67)[Chatham, William Pitt, 1st E. of (C 785-786)]. https://collections.library.yale.edu/catalog/2038760.