MLA

Brady, Mathew B., approximately 1823-1896. Ford's Theatre. John Wilkes Booth escaping on horseback from the rear of Ford's Theater after assassinating Abraham Lincoln, engraving. Box 29, folder 1299. 1849-circa 1956. https://collections.library.yale.edu/catalog/33292704.

APA, 6th edition

Brady, Mathew B., approximately 1823-1896. (["Box 29, folder 1299"])(1849-circa 1956)[Ford's Theatre. John Wilkes Booth escaping on horseback from the rear of Ford's Theater after assassinating Abraham Lincoln, engraving]. https://collections.library.yale.edu/catalog/33292704.