MLA

Ord, Edward Otho Cresap, 1818-1883. Edward Otho Cresap Ord letter to Jefferson Davis, 1853 December 30 : manuscript. (File). 1853 December 30.. https://collections.library.yale.edu/catalog/2068022.

APA, 6th edition

Ord, Edward Otho Cresap, 1818-1883. (["(File)"])(1853 December 30.)[Edward Otho Cresap Ord letter to Jefferson Davis, 1853 December 30 : manuscript]. https://collections.library.yale.edu/catalog/2068022.