University of Sussex. Institute of Development Studies & Apthorpe, R. J. (1970). People planning and development studies: Some reflections on social planning. F. Cass.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of Sussex. Institute of Development Studies و Raymond J. Apthorpe. People Planning and Development Studies: Some Reflections on Social Planning. London: F. Cass, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)University of Sussex. Institute of Development Studies و Raymond J. Apthorpe. People Planning and Development Studies: Some Reflections on Social Planning. F. Cass, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.