[Letter : [1965?] March 8 to Saul Steinberg]
MLA
[Letter : [1965?] March 8 to Saul Steinberg]. 0AD. https://collections.library.yale.edu/catalog/10034233.
APA, 6th edition
[Letter : [1965?] March 8 to Saul Steinberg]. (0 C.E.). [Autographs, correspondence (AAT), Envelopes]. https://collections.library.yale.edu/catalog/10034233.