Fels, R., & Siegfried, J. J. (1974). Recent advances in economics: A book of readings. Published for the American Economic Association by R. D. Irwin.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Fels, Rendigs, و John J. Siegfried. Recent Advances in Economics: A Book of Readings. Homewood, Ill.: Published for the American Economic Association by R. D. Irwin, 1974.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Fels, Rendigs, و John J. Siegfried. Recent Advances in Economics: A Book of Readings. Published for the American Economic Association by R. D. Irwin, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.