MLA

Tocqueville, Alexis de, 1805-1859. a. Tocqueville and Beaumont relations with Americans: letters, diaries, notes, etc.. Box 46. 1840-1861. https://collections.library.yale.edu/catalog/2016986.

APA, 6th edition

Tocqueville, Alexis de, 1805-1859. (["Box 46"])(1840-1861)[a. Tocqueville and Beaumont relations with Americans: letters, diaries, notes, etc.]. https://collections.library.yale.edu/catalog/2016986.