MLA

Mann, Thomas, 1875-1955. 61. [Die Kunst des Romans] Typescript (original) with a few corrections by TM and a few notes by HLP; 18 numbered leaves. Box 10, folder 164. 1926-45. https://collections.library.yale.edu/catalog/31907107.

APA, 6th edition

Mann, Thomas, 1875-1955. (["Box 10, folder 164"])(1926-45)[61. [Die Kunst des Romans] Typescript (original) with a few corrections by TM and a few notes by HLP; 18 numbered leaves]. https://collections.library.yale.edu/catalog/31907107.