Cross, N. (2003). Evidence for hope: The search for sustainable development : the story of the International Institute for Environment and Development. Earthscan Publications.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cross, Nigel. Evidence for Hope: The Search for Sustainable Development : The Story of the International Institute for Environment and Development. London ; Sterling, VA: Earthscan Publications, 2003.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cross, Nigel. Evidence for Hope: The Search for Sustainable Development : The Story of the International Institute for Environment and Development. Earthscan Publications, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.