Cite web page as: Monticello: arch. detail (dome room), circa 1805, by Thomas Jefferson. N177; K160b [electronic edition].
Thomas Jefferson Papers: An Electronic Archive. Boston, Mass. : Massachusetts Historical Society, 2003. http://www.thomasjeffersonpapers.org/
Original manuscript: Jefferson, Thomas. Monticello: arch. detail (dome room), 1 sheet, 2 pages circa 1805. N177; K160b. Dimensions: 75.7 cm x 54.3 cm (29-13/16" x 21-3/8"). Original manuscript from the Coolidge Collection of Thomas Jefferson Manuscripts, Massachusetts Historical Society.