Cite

"Heidegger-Aufsatz" [concerns chiefly Natorp]: research notes (Envelope #100)

MLA

Cassirer, Ernst, 1874-1945. "Heidegger-Aufsatz" [concerns chiefly Natorp]: research notes (Envelope #100). Box 42, folder 837-38. n.d.. https://collections.library.yale.edu/catalog/17274634.

APA, 6th edition

Cassirer, Ernst, 1874-1945. (["Box 42, folder 837-38"])(n.d.)["Heidegger-Aufsatz" [concerns chiefly Natorp]: research notes (Envelope #100)]. https://collections.library.yale.edu/catalog/17274634.