MLA

Sligo, Howe Peter Browne, Marquess of, 1788-1845. Letters to George Glendining, Esq.. Box 1 | Folder 4. 1810 October-1810 December. https://collections.library.yale.edu/catalog/11706788.

APA, 6th edition

Sligo, Howe Peter Browne, Marquess of, 1788-1845. (["Box 1 | Folder 4"])(1810 October-1810 December)[Letters to George Glendining, Esq.]. https://collections.library.yale.edu/catalog/11706788.