Cite

Portion of a map of New England in the Public Record Office, London, Eng. : Copied for Chas. Hervey Townshend, Esq. of "Raynham," New Haven, Connecticut, U.S.A. by L.M. Byrne, April, 1887.

MLA

Portion of a Map of New England in the Public Record Office, London, Eng. : Copied for Chas. Hervey Townshend, Esq. of "Raynham," New Haven, Connecticut, U.S.A. by L.M. Byrne, April, 1887. U.S. Coast and Geodetic Survey, 19AD. https://collections.library.yale.edu/catalog/15606969.

APA, 6th edition

Portion of a map of New England in the Public Record Office, London, Eng. : Copied for Chas. Hervey Townshend, Esq. of "Raynham," New Haven, Connecticut, U.S.A. by L.M. Byrne, April, 1887. (19 C.E.). [Nautical charts]. U.S. Coast and Geodetic Survey, https://collections.library.yale.edu/catalog/15606969.