MLA

Bainton, Roland H. (Roland Herbert), 1894-1984. Bainton, Roland H.. 55, folder 808. undated. https://collections.library.yale.edu/catalog/33598974.

APA, 6th edition

Bainton, Roland H. (Roland Herbert), 1894-1984. (["55, folder 808"])(undated)[Bainton, Roland H.]. https://collections.library.yale.edu/catalog/33598974.