MLA

Huntington, Ellsworth, 1876-1947. Chinese visas. Box 1, folder 2. undated. https://collections.library.yale.edu/catalog/32202956.

APA, 6th edition

Huntington, Ellsworth, 1876-1947. (["Box 1, folder 2"])(undated)[Chinese visas]. https://collections.library.yale.edu/catalog/32202956.