Government, G. B. M. o. H. a. L., & Government, G. B. M. o. H. a. L. (1969). Preservation of historic buildings and areas. London : Her Majesty's Stationery Office.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Government, Great Britain. Ministry of Housing and Local, و Great Britain. Ministry of Housing and Local Government. Preservation of Historic Buildings and Areas. London : Her Majesty's Stationery Office, 1969.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Government, Great Britain. Ministry of Housing and Local, و Great Britain. Ministry of Housing and Local Government. Preservation of Historic Buildings and Areas. London : Her Majesty's Stationery Office, 1969.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.