Mathers, E. Powys (Edward Powys)
MLA
Argus Book Shop (Chicago, Ill.). Mathers, E. Powys (Edward Powys). Box 8, folder 295. 1933 Oct 23. https://collections.library.yale.edu/catalog/17158119.
APA, 6th edition
Argus Book Shop (Chicago, Ill.). (["Box 8, folder 295"])(1933 Oct 23)[Mathers, E. Powys (Edward Powys)]. https://collections.library.yale.edu/catalog/17158119.