Cite

Barrie and his mother Margaret

MLA

Barrie, J. M. (James Matthew), 1860-1937. Barrie and his mother Margaret. Box 59, folder 1179. undated. https://collections.library.yale.edu/catalog/2008256.

APA, 6th edition

Barrie, J. M. (James Matthew), 1860-1937. (["Box 59, folder 1179"])(undated)[Barrie and his mother Margaret]. https://collections.library.yale.edu/catalog/2008256.