Spar, M. A., & Martin, J. H. (1983). Housing units authorized in Virginia's planning districts, counties, and cities: 1st and 2nd quarters, 1982. University of Virginia, Colgate Darden School of Business Administration, Tayloe Murphy Institute.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিSpar, Michael A., এবং Julia H. Martin. Housing Units Authorized in Virginia's Planning Districts, Counties, and Cities: 1st and 2nd Quarters, 1982. Charlottesville, Va.: University of Virginia, Colgate Darden School of Business Administration, Tayloe Murphy Institute, 1983.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিSpar, Michael A., এবং Julia H. Martin. Housing Units Authorized in Virginia's Planning Districts, Counties, and Cities: 1st and 2nd Quarters, 1982. University of Virginia, Colgate Darden School of Business Administration, Tayloe Murphy Institute, 1983.