Cite

Maclean, John, Princeton, to Peter Parker

MLA

Parker, Peter, 1804-1888. Maclean, John, Princeton, to Peter Parker. 1884 April 29. https://collections.library.yale.edu/catalog/16808652.

APA, 6th edition

Parker, Peter, 1804-1888. (1884 April 29)[Maclean, John, Princeton, to Peter Parker]. https://collections.library.yale.edu/catalog/16808652.