MLA

Hoover, Lyman, 1901-. Japan. 30, folder 554. 1936-1952. https://collections.library.yale.edu/catalog/33298722.

APA, 6th edition

Hoover, Lyman, 1901-. (["30, folder 554"])(1936-1952)[Japan]. https://collections.library.yale.edu/catalog/33298722.