MLA

Bainton, Roland H. (Roland Herbert), 1894-1984. Alter, James. 55, folder 803. undated. https://collections.library.yale.edu/catalog/33591440.

APA, 6th edition

Bainton, Roland H. (Roland Herbert), 1894-1984. (["55, folder 803"])(undated)[Alter, James]. https://collections.library.yale.edu/catalog/33591440.