MLA

Lees-Milne, James, 1908-1997. McDouall, Robin. Box 11, folder 496. 1980-83. https://collections.library.yale.edu/catalog/16561313.

APA, 6th edition

Lees-Milne, James, 1908-1997. (["Box 11, folder 496"])(1980-83)[McDouall, Robin]. https://collections.library.yale.edu/catalog/16561313.