National Building Research Institute (South Africa). (1967). A guide to special housing for aged people. South African Council for Scientific and Industrial Research, National Building Research Institute.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Building Research Institute (South Africa). A Guide to Special Housing for Aged People. Pretoria: South African Council for Scientific and Industrial Research, National Building Research Institute, 1967.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)National Building Research Institute (South Africa). A Guide to Special Housing for Aged People. South African Council for Scientific and Industrial Research, National Building Research Institute, 1967.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.