MLA

Tchelitchew, Pavel, 1898-1957. Official documents. Box 28, folder 481-482. 1917-1940. https://collections.library.yale.edu/catalog/15825680.

APA, 6th edition

Tchelitchew, Pavel, 1898-1957. (["Box 28, folder 481-482"])(1917-1940)[Official documents]. https://collections.library.yale.edu/catalog/15825680.