MLA

Book, Beinecke Rare, and Manuscript Library. Seligman, Sybil. 0AD. https://collections.library.yale.edu/catalog/16101607.

APA, 6th edition

Book, B. R., & Library, M. (0 C.E.). Seligman, Sybil. https://collections.library.yale.edu/catalog/16101607.