MLA

Bainton, Roland H. (Roland Herbert), 1894-1984. Archer, John Clark. 55, folder 804. undated. https://collections.library.yale.edu/catalog/33591441.

APA, 6th edition

Bainton, Roland H. (Roland Herbert), 1894-1984. (["55, folder 804"])(undated)[Archer, John Clark]. https://collections.library.yale.edu/catalog/33591441.