MLA

Ballou, Earle H. (Earle Hoit), 1892-1987. China. 16, folder 197. n.d.. https://collections.library.yale.edu/catalog/33111212.

APA, 6th edition

Ballou, Earle H. (Earle Hoit), 1892-1987. (["16, folder 197"])(n.d.)[China]. https://collections.library.yale.edu/catalog/33111212.