Cite

Unknown photographer Half length formal portrait of sailor, facing right, arms folded. Photographic postcard

MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Half length formal portrait of sailor, facing right, arms folded. Photographic postcard. Box 25. circa 1918. https://collections.library.yale.edu/catalog/16172738.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 25"])(circa 1918)[Unknown photographer Half length formal portrait of sailor, facing right, arms folded. Photographic postcard]. https://collections.library.yale.edu/catalog/16172738.