Germany
MLA
McKay, Claude, 1890-1948. Germany. Box 16, folder 495. n.d.. https://collections.library.yale.edu/catalog/16742371.
APA, 6th edition
McKay, Claude, 1890-1948. (["Box 16, folder 495"])(n.d.)[Germany]. https://collections.library.yale.edu/catalog/16742371.