Cite

Lloyd's official map of the state of Virginia : from actual surveys by order of the Executive, 1828 & 1859 / corrected and revised by J.T. Lloyd to 1861.

MLA

Lloyd, James T. Lloyd's Official Map of the State of Virginia : from Actual Surveys by Order of the Executive, 1828 & 1859 / Corrected and Revised by J.T. Lloyd to 1861. J.T. Lloyd, 1861. https://collections.library.yale.edu/catalog/15811245.

APA, 6th edition

Lloyd, J. T. (1861). Lloyd's official map of the state of Virginia : from actual surveys by order of the Executive, 1828 & 1859 / corrected and revised by J.T. Lloyd to 1861. [Maps]. J.T. Lloyd, https://collections.library.yale.edu/catalog/15811245.