MLA

Simpson, Randolph Linsly, 1927-1992. Keystone View Company, Meadville, PA; and other cities "115 - 16738 Mining Phosphate and Loading Cars Near Columbia, Tenn." Stereograph, grey card. Box 13, folder 619. circa 1898. https://collections.library.yale.edu/catalog/32582565.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 619"])(circa 1898)[Keystone View Company, Meadville, PA; and other cities "115 - 16738 Mining Phosphate and Loading Cars Near Columbia, Tenn." Stereograph, grey card]. https://collections.library.yale.edu/catalog/32582565.