Frewer, G. (1985). Optimal destabilisation, active learning, and the choice of step length in policy reform. Department of Economics, University of Warwick.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Frewer, Geoff. Optimal Destabilisation, Active Learning, and the Choice of Step Length in Policy Reform. [Coventry, England]: Department of Economics, University of Warwick, 1985.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Frewer, Geoff. Optimal Destabilisation, Active Learning, and the Choice of Step Length in Policy Reform. Department of Economics, University of Warwick, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.