Cite

"Scenario for a proposed Film Of Peter Pan or The Boy Who Wouldn't Grow Up"

MLA

Barrie, J. M. (James Matthew), 1860-1937. "Scenario for a proposed Film Of Peter Pan or The Boy Who Wouldn't Grow Up". Box 43, folder 937. 1921. https://collections.library.yale.edu/catalog/17328113.

APA, 6th edition

Barrie, J. M. (James Matthew), 1860-1937. (["Box 43, folder 937"])(1921)["Scenario for a proposed Film Of Peter Pan or The Boy Who Wouldn't Grow Up"]. https://collections.library.yale.edu/catalog/17328113.