MLA

Eliot, George, 1819-1880. 11a. DIARY. Box 48. 1877. https://collections.library.yale.edu/catalog/33295734.

APA, 6th edition

Eliot, George, 1819-1880. (["Box 48"])(1877)[11a. DIARY]. https://collections.library.yale.edu/catalog/33295734.