Bolen, G. L. (1903). The plain facts as to the trusts and the tariff: With chapters on the railroad problem and municipal monopolies. The Macmillan company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bolen, George Lewis. The Plain Facts as to the Trusts and the Tariff: With Chapters on the Railroad Problem and Municipal Monopolies. New York, London: The Macmillan company, 1903.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Bolen, George Lewis. The Plain Facts as to the Trusts and the Tariff: With Chapters on the Railroad Problem and Municipal Monopolies. The Macmillan company, 1903.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.