MLA

Kagan, Paul, 1943-1993. Untitled. Short essay on the end of the Llano Colony, later draft, typescript carbon, corrected. Box 2, folder 78. n.d.. https://collections.library.yale.edu/catalog/17157282.

APA, 6th edition

Kagan, Paul, 1943-1993. (["Box 2, folder 78"])(n.d.)[Untitled. Short essay on the end of the Llano Colony, later draft, typescript carbon, corrected]. https://collections.library.yale.edu/catalog/17157282.