MLA

Kagan, Paul, 1943-1993. Contact prints made from glass plate negatives of Llano del Rio people, landscapes and buildings. Box 4, folder 90. n.d.. https://collections.library.yale.edu/catalog/16313370.

APA, 6th edition

Kagan, Paul, 1943-1993. (["Box 4, folder 90"])(n.d.)[Contact prints made from glass plate negatives of Llano del Rio people, landscapes and buildings]. https://collections.library.yale.edu/catalog/16313370.