Folk, G. E. (1942). Patents and industrial progress: A summary, analysis, and evaluation of the record on patents of the Temporary National Economic Committee. Harper & Brothers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Folk, George E. Patents and Industrial Progress: A Summary, Analysis, and Evaluation of the Record on Patents of the Temporary National Economic Committee. New York, London: Harper & Brothers, 1942.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Folk, George E. Patents and Industrial Progress: A Summary, Analysis, and Evaluation of the Record on Patents of the Temporary National Economic Committee. Harper & Brothers, 1942.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.