MLA

McKay, Claude, 1890-1948. Binsfeld, Edmund. Box 1, folder 11. 1944-47. https://collections.library.yale.edu/catalog/16742346.

APA, 6th edition

McKay, Claude, 1890-1948. (["Box 1, folder 11"])(1944-47)[Binsfeld, Edmund]. https://collections.library.yale.edu/catalog/16742346.