Portmore, Charles, 2nd E. (C 2278-2279) n.d., 1778
MLA
Boswell, James, 1740-1795. Portmore, Charles, 2nd E. (C 2278-2279) n.d., 1778. Box 29, folder 744. 1672-1850. https://collections.library.yale.edu/catalog/32501126.
APA, 6th edition
Boswell, James, 1740-1795. (["Box 29, folder 744"])(1672-1850)[Portmore, Charles, 2nd E. (C 2278-2279) n.d., 1778]. https://collections.library.yale.edu/catalog/32501126.