Plato, Seminar on [Yale]: research notes (Envelope #12)
MLA
Cassirer, Ernst, 1874-1945. Plato, Seminar on [Yale]: research notes (Envelope #12). Box 48, folder 963. 1893-1945. https://collections.library.yale.edu/catalog/17274644.
APA, 6th edition
Cassirer, Ernst, 1874-1945. (["Box 48, folder 963"])(1893-1945)[Plato, Seminar on [Yale]: research notes (Envelope #12)]. https://collections.library.yale.edu/catalog/17274644.