Sumbatov, V. A.
MLA
Filippov, Boris, 1905-1991. Sumbatov, V. A.. Box 9, folder 258. 1960-69. https://collections.library.yale.edu/catalog/16537982.
APA, 6th edition
Filippov, Boris, 1905-1991. (["Box 9, folder 258"])(1960-69)[Sumbatov, V. A.]. https://collections.library.yale.edu/catalog/16537982.