Hoffman, F. L. (1920). Occupational diseases and their compensation: With special reference to anthrax and miners' lung diseases. Prudential Press; P.S. King & son.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hoffman, Frederick L. Occupational Diseases and Their Compensation: With Special Reference to Anthrax and Miners' Lung Diseases. Newark, N.J., London: Prudential Press; P.S. King & son, 1920.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hoffman, Frederick L. Occupational Diseases and Their Compensation: With Special Reference to Anthrax and Miners' Lung Diseases. Prudential Press; P.S. King & son, 1920.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.