MLA

Jeleński, Konstanty A. (Konstanty Aleksander), 1922-1987. "Some background material for the Alghero seminar on the student rebellion and the future of Western industrialized societies", typescript (copy). Box 13, folder 320. 1969 April. https://collections.library.yale.edu/catalog/16612902.

APA, 6th edition

Jeleński, Konstanty A. (Konstanty Aleksander), 1922-1987. (["Box 13, folder 320"])(1969 April)["Some background material for the Alghero seminar on the student rebellion and the future of Western industrialized societies", typescript (copy)]. https://collections.library.yale.edu/catalog/16612902.