MLA

Amichai, Yehuda, 1924-2000. Oz, Amos. Box 9, folder 425. 1972-1985, n.d.. https://collections.library.yale.edu/catalog/17282942.

APA, 6th edition

Amichai, Yehuda, 1924-2000. (["Box 9, folder 425"])(1972-1985, n.d.)[Oz, Amos]. https://collections.library.yale.edu/catalog/17282942.