MLA

Pearson, Norman Holmes, 1909-1975. Miscellaneous. circa 1909-1975. https://collections.library.yale.edu/catalog/33552049.

APA, 6th edition

Pearson, Norman Holmes, 1909-1975. (circa 1909-1975)[Miscellaneous]. https://collections.library.yale.edu/catalog/33552049.