MLA

Broch, Hermann, 1886-1951. Advertisements. Box 33, folder 830. 1979. https://collections.library.yale.edu/catalog/2036356.

APA, 6th edition

Broch, Hermann, 1886-1951. (["Box 33, folder 830"])(1979)[Advertisements]. https://collections.library.yale.edu/catalog/2036356.