MLA

Ochoa Carrillo, Antonio, 1811-1883. Ochoa Carrillo, Antonio. Autograph draft letter: Guadalupe y Calvo, to Count d'Abicy. Box 1, folder 47. 1866 January. https://collections.library.yale.edu/catalog/32319935.

APA, 6th edition

Ochoa Carrillo, Antonio, 1811-1883. (["Box 1, folder 47"])(1866 January)[Ochoa Carrillo, Antonio. Autograph draft letter: Guadalupe y Calvo, to Count d'Abicy]. https://collections.library.yale.edu/catalog/32319935.