Turnham, D. (1971). The employment problem in less developed countries: A review of evidence. Organization for Economic Cooperation and Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Turnham, David. The Employment Problem in Less Developed Countries: A Review of Evidence. Paris: Organization for Economic Cooperation and Development, 1971.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Turnham, David. The Employment Problem in Less Developed Countries: A Review of Evidence. Organization for Economic Cooperation and Development, 1971.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.