Donald, G. (1970). Development Digest: A quarterly journal of excerpts, summaries, and reprints of current materials on economic and social development (Vol.). National Planning Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Donald, Gordon. Development Digest: A Quarterly Journal of Excerpts, Summaries, and Reprints of Current Materials on Economic and Social Development. Vol. Washington, D. C.: National Planning Association, 1970.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Donald, Gordon. Development Digest: A Quarterly Journal of Excerpts, Summaries, and Reprints of Current Materials on Economic and Social Development. Vol. National Planning Association, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.