MLA

Amichai, Yehuda, 1924-2000. Celan, Paul. Box 3, folder 106. 1969 Nov 7. https://collections.library.yale.edu/catalog/16549133.

APA, 6th edition

Amichai, Yehuda, 1924-2000. (["Box 3, folder 106"])(1969 Nov 7)[Celan, Paul]. https://collections.library.yale.edu/catalog/16549133.