Charlotte V. Brown, and Jim Sumner (April 1981). "Aspen Hall"(PDF). National Register of Historic Places - Nomination and Inventory. North Carolina State Historic Preservation Office. Retrieved August 1, 2014.
Survey and Planning Unit (September 1974). "Alston-DeGraffenried House"(PDF). National Register of Historic Places - Nomination and Inventory. North Carolina State Historic Preservation Office. Retrieved August 1, 2014.
ncdcr.gov
hpo.ncdcr.gov
Kitty Houston and Lee Novick (April 1993). "Alston-DeGraffenried Plantation (Boundary Increase/Amendment)"(PDF). National Register of Historic Places - Nomination and Inventory. North Carolina State Historic Preservation Office. Archived from the original(PDF) on December 28, 2012. Retrieved August 1, 2014.
Kitty Houston and Lee Novick (April 1993). "Alston-DeGraffenried Plantation (Boundary Increase/Amendment)"(PDF). National Register of Historic Places - Nomination and Inventory. North Carolina State Historic Preservation Office. Archived from the original(PDF) on December 28, 2012. Retrieved August 1, 2014.