APA (7th ed.) Citation

George, H., & George, H. (1898). The science of political economy. Doubleday & McClure Co..

Chicago Style (17th ed.) Citation

George, Henry, and Henry George. The Science of Political Economy. New York: Doubleday & McClure Co., 1898.

MLA (9th ed.) Citation

George, Henry, and Henry George. The Science of Political Economy. Doubleday & McClure Co., 1898.