APA (7th ed.) Citation

Porter, R. P. (1890). The progress of one hundred years. American Protective Tariff League.

Chicago Style (17th ed.) Citation

Porter, Robert P. The Progress of One Hundred Years. New York: American Protective Tariff League, 1890.

MLA (9th ed.) Citation

Porter, Robert P. The Progress of One Hundred Years. American Protective Tariff League, 1890.

Warning: These citations may not always be 100% accurate.