MLA

Low, David, 1891-1963. Krokodil. Box 9, folder 446. 1942-45. https://collections.library.yale.edu/catalog/16457736.

APA, 6th edition

Low, David, 1891-1963. (["Box 9, folder 446"])(1942-45)[Krokodil]. https://collections.library.yale.edu/catalog/16457736.