MLA

Wolff, Kurt, 1887-1963. Kubin, Alfred [with transcripts]. Box 5, folder 193-94. 1918-21. https://collections.library.yale.edu/catalog/2021335.

APA, 6th edition

Wolff, Kurt, 1887-1963. (["Box 5, folder 193-94"])(1918-21)[Kubin, Alfred [with transcripts]]. https://collections.library.yale.edu/catalog/2021335.