MLA

Jeleński, Konstanty A. (Konstanty Aleksander), 1922-1987. Buber, Martin, incoming. Box 6, folder 145. 1951-1955. https://collections.library.yale.edu/catalog/16612880.

APA, 6th edition

Jeleński, Konstanty A. (Konstanty Aleksander), 1922-1987. (["Box 6, folder 145"])(1951-1955)[Buber, Martin, incoming]. https://collections.library.yale.edu/catalog/16612880.