Symposium on International Economic Dimensions of Environmental Management, New York, & Walter, I. (1976). Studies in international environmental economics. John Wiley.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Symposium on International Economic Dimensions of Environmental Management, New York, و Ingo Walter. Studies in International Environmental Economics. New York: John Wiley, 1976.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Symposium on International Economic Dimensions of Environmental Management, New York, و Ingo Walter. Studies in International Environmental Economics. John Wiley, 1976.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.