Germany. (Federal Republic, 1949-), & Harrell, H. (1977). Regional planning and urban development: An overview of the Federal Regional Planning programme, the 1974 regional planning report and the 1975 urban development report of the Federal Government. s.n.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Germany. (Federal Republic, 1949-), و Herbert Harrell. Regional Planning and Urban Development: An Overview of the Federal Regional Planning Programme, the 1974 Regional Planning Report and the 1975 Urban Development Report of the Federal Government. Bonn: s.n, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Germany. (Federal Republic, 1949-), و Herbert Harrell. Regional Planning and Urban Development: An Overview of the Federal Regional Planning Programme, the 1974 Regional Planning Report and the 1975 Urban Development Report of the Federal Government. s.n, 1977.