Cite

Lord Howard to Earl of Essex; Edinburgh

MLA

Howard of Escrick, Edward Howard, Baron, -1675. Lord Howard to Earl of Essex; Edinburgh. Box 1, folder 7. 1641 Sep 1. https://collections.library.yale.edu/catalog/31902502.

APA, 6th edition

Howard of Escrick, Edward Howard, Baron, -1675. (["Box 1, folder 7"])(1641 Sep 1)[Lord Howard to Earl of Essex; Edinburgh]. https://collections.library.yale.edu/catalog/31902502.