MLA

Parker, Peter, 1804-1888. Poems. Box 8, folder 9. 1829-1854. https://collections.library.yale.edu/catalog/16808839.

APA, 6th edition

Parker, Peter, 1804-1888. (["Box 8, folder 9"])(1829-1854)[Poems]. https://collections.library.yale.edu/catalog/16808839.