MLA

Montagu, Charles, Duke of Manchester, 1660?-1722. The Earl of Jersey to the E of M (partly in cipher, deciphered), announcing that "the great affair had come to a good conclusion, the province of Holland having consented." (Printed. Cole's Memoirs, p. 96) Whitehall. Box 3, folder 3. 1699/1700 Jan 11. https://collections.library.yale.edu/catalog/16601192.

APA, 6th edition

Montagu, Charles, Duke of Manchester, 1660?-1722. (["Box 3, folder 3"])(1699/1700 Jan 11)[The Earl of Jersey to the E of M (partly in cipher, deciphered), announcing that "the great affair had come to a good conclusion, the province of Holland having consented." (Printed. Cole's Memoirs, p. 96) Whitehall]. https://collections.library.yale.edu/catalog/16601192.