"H. R. C."
MLA
Thayer, Scofield, 1889-1982. "H. R. C.". Box 57, folder 1523. 1913. https://collections.library.yale.edu/catalog/17142330.
APA, 6th edition
Thayer, Scofield, 1889-1982. (["Box 57, folder 1523"])(1913)["H. R. C."]. https://collections.library.yale.edu/catalog/17142330.