MLA

Harris, Joseph S. (Joseph Smith), 1836-1910. [51] Capt. Bannacks Observatory Yahk Station / Lieut. Darrah--Observatory for Latitude. Box 9. 1848-1903. https://collections.library.yale.edu/catalog/2004863.

APA, 6th edition

Harris, Joseph S. (Joseph Smith), 1836-1910. (["Box 9"])(1848-1903)[[51] Capt. Bannacks Observatory Yahk Station / Lieut. Darrah--Observatory for Latitude]. https://collections.library.yale.edu/catalog/2004863.