Cite

"Torre de la Observacion," autograph manuscript

MLA

Irving, Washington, 1783-1859. "Torre de la Observacion," autograph manuscript. Box 6. undated. https://collections.library.yale.edu/catalog/17364295.

APA, 6th edition

Irving, Washington, 1783-1859. (["Box 6"])(undated)["Torre de la Observacion," autograph manuscript]. https://collections.library.yale.edu/catalog/17364295.