MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer "Deck Division-U.S.S. Conestoga"; group of officers and men portrayed on deck of their ship. Photographic postcard. Box 25. circa 1917. https://collections.library.yale.edu/catalog/16172734.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 25"])(circa 1917)[Unknown photographer "Deck Division-U.S.S. Conestoga"; group of officers and men portrayed on deck of their ship. Photographic postcard]. https://collections.library.yale.edu/catalog/16172734.