Commission on the History of Geographical Thought, International Union of the History and Philosophy of Science, Freeman, T. W., & Pinchemel, P. (1978). Geographers: Biobibliographical studies. Mansell Information Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Commission on the History of Geographical Thought, International Union of the History and Philosophy of Science, Thomas Walter Freeman, و Philippe Pinchemel. Geographers: Biobibliographical Studies. London: Mansell Information Publishing, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Commission on the History of Geographical Thought, et al. Geographers: Biobibliographical Studies. Mansell Information Publishing, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.