APA-referens (7:e uppl.)

Northern Virginia Regional Planning and Economic Development Commission. (1965). Open space project; a summary report. s.n.

Chicago-referens (17:e uppl.)

Northern Virginia Regional Planning and Economic Development Commission. Open Space Project; a Summary Report. Arlington, Va: s.n, 1965.

MLA-referens (9:e uppl.)

Northern Virginia Regional Planning and Economic Development Commission. Open Space Project; a Summary Report. s.n, 1965.