Cite

Incoming letters and copies of outgoing letters

MLA

Kline, George L. (George Louis), 1921-2014. Incoming letters and copies of outgoing letters. Box 1, folder 1-3. 1972-1994. https://collections.library.yale.edu/catalog/16603941.

APA, 6th edition

Kline, George L. (George Louis), 1921-2014. (["Box 1, folder 1-3"])(1972-1994)[Incoming letters and copies of outgoing letters]. https://collections.library.yale.edu/catalog/16603941.