MLA

Miłosz, Czesław, 1911-2004. Csikszentmihalyi, Mark, "An Interview with Czeslaw Milosz," printed version. Box 153, folder 2417. 1985 December. https://collections.library.yale.edu/catalog/10091520.

APA, 6th edition

Miłosz, Czesław, 1911-2004. (["Box 153, folder 2417"])(1985 December)[Csikszentmihalyi, Mark, "An Interview with Czeslaw Milosz," printed version]. https://collections.library.yale.edu/catalog/10091520.