Cite

Correspondence pertaining to Magic Book, comments, etc.

MLA

Seligmann, Kurt, 1900-1962. Correspondence pertaining to Magic Book, comments, etc.. Box 29. undated. https://collections.library.yale.edu/catalog/11693643.

APA, 6th edition

Seligmann, Kurt, 1900-1962. (["Box 29"])(undated)[Correspondence pertaining to Magic Book, comments, etc.]. https://collections.library.yale.edu/catalog/11693643.