APA (7 ম সংস্করণ) উদ্ধৃতি

Northern Virginia Regional Planning and Economic Development Commission & National Capital Open Space Program. (1965). Action for open space. s.n.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Northern Virginia Regional Planning and Economic Development Commission এবং National Capital Open Space Program. Action for Open Space. Arlington, Va: s.n, 1965.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Northern Virginia Regional Planning and Economic Development Commission এবং National Capital Open Space Program. Action for Open Space. s.n, 1965.