"Vorticism": typescript
MLA
Pound, Ezra, 1885-1972. "Vorticism": typescript. Box 139, folder 6152. n.d.. https://collections.library.yale.edu/catalog/2112450.
APA, 6th edition
Pound, Ezra, 1885-1972. (["Box 139, folder 6152"])(n.d.)["Vorticism": typescript]. https://collections.library.yale.edu/catalog/2112450.