(East-West Environment and Policy Institute (Honolulu, Hawaii, & .Carpenter, R. A. (1983). Natural systems for development: What planners need to know. Macmillan ; Collier Macmillan.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)(East-West Environment and Policy Institute (Honolulu, Hawaii, و Richard A. .Carpenter. Natural Systems for Development: What Planners Need to Know. New York : London: Macmillan ; Collier Macmillan, 1983.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)(East-West Environment and Policy Institute (Honolulu, Hawaii, و Richard A. .Carpenter. Natural Systems for Development: What Planners Need to Know. Macmillan ; Collier Macmillan, 1983.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.