MLA

Platner, Warren, 1919-2006. Transparencies. Box 11 | Box 12, folder 4-14. 1971. https://collections.library.yale.edu/catalog/10021301.

APA, 6th edition

Platner, Warren, 1919-2006. (["Box 11 | Box 12, folder 4-14"])(1971)[Transparencies]. https://collections.library.yale.edu/catalog/10021301.