Cite

Letter from unidentified sender 4

MLA

Parker, Peter, 1804-1888. Letter from unidentified sender 4. n.y. August 28. https://collections.library.yale.edu/catalog/16808698.

APA, 6th edition

Parker, Peter, 1804-1888. (n.y. August 28)[Letter from unidentified sender 4]. https://collections.library.yale.edu/catalog/16808698.