Chatham Mansion, Fredericksburg, Virginia. Where George Washington and Robert E. Lee did their courting. Lincoln visited here during the battle of Fredericksburg. Said to be the only existing roof which sheltered both Washington and Lincoln.

Chicago citation style
Department of Agriculture. Agricultural Research Administration. Bureau of Plant Industry, Soils, and Agricultural Engineering. Division of Fruit and Vegetable Crops and Diseases. 2/23/1942-5/10/1951. Chatham Mansion, Fredericksburg, Virginia. Where George Washington and Robert E. Lee did their courting. Lincoln visited here during the battle of Fredericksburg. Said to be the only existing roof which sheltered both Washington and Lincoln.. 1929-08-22. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/516529. (Accessed October 23, 2018.)
APA citation style
Department of Agriculture. Agricultural Research Administration. Bureau of Plant Industry, Soils, and Agricultural Engineering. Division of Fruit and Vegetable Crops and Diseases. 2/23/1942-5/10/1951, (1929-08-22) Chatham Mansion, Fredericksburg, Virginia. Where George Washington and Robert E. Lee did their courting. Lincoln visited here during the battle of Fredericksburg. Said to be the only existing roof which sheltered both Washington and Lincoln.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/516529
MLA citation style
Department of Agriculture. Agricultural Research Administration. Bureau of Plant Industry, Soils, and Agricultural Engineering. Division of Fruit and Vegetable Crops and Diseases. 2/23/1942-5/10/1951. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/516529>.
Note: These citations are programmatically generated and may be incomplete.