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.
Chicago-referens (17:e uppl.)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.
MLA-referens (8:e uppl.)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.
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