MLA

Ochoa Carrillo, Antonio, 1811-1883. Corona, Ramón. Autograph letter, signed: Guadalajara, to Antonio Ochoa Carrillo. Box 1, folder 76. 1871 May 14. https://collections.library.yale.edu/catalog/32320231.

APA, 6th edition

Ochoa Carrillo, Antonio, 1811-1883. (["Box 1, folder 76"])(1871 May 14)[Corona, Ramón. Autograph letter, signed: Guadalajara, to Antonio Ochoa Carrillo]. https://collections.library.yale.edu/catalog/32320231.