National Research Council (U.S.). Committee on Strategic Directions for the Geographical Sciences in the Next Decade & ebrary, Inc. (2010). Understanding the changing planet: Strategic directions for the geographical sciences. National Academies Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Committee on Strategic Directions for the Geographical Sciences in the Next Decade و Inc ebrary. Understanding the Changing Planet: Strategic Directions for the Geographical Sciences. Washington, D.C.: National Academies Press, 2010.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Committee on Strategic Directions for the Geographical Sciences in the Next Decade و Inc ebrary. Understanding the Changing Planet: Strategic Directions for the Geographical Sciences. National Academies Press, 2010.