MLA

Argus Book Shop (Chicago, Ill.). Callaghan, Morley. Box 2, folder 66. 1937. https://collections.library.yale.edu/catalog/17158113.

APA, 6th edition

Argus Book Shop (Chicago, Ill.). (["Box 2, folder 66"])(1937)[Callaghan, Morley]. https://collections.library.yale.edu/catalog/17158113.