Hubbard, R. G., & Kane, T. (2013). Balance: The economics of great powers from ancient Rome to modern America (1st Simon & Schuster hardcover edition.). Simon & Schuster.
Cita Chicago (17th ed.)Hubbard, R. Glenn, i Tim Kane. Balance: The Economics of Great Powers from Ancient Rome to Modern America. 1st Simon & Schuster hardcover edition. New York: Simon & Schuster, 2013.
Cita MLA (9th ed.)Hubbard, R. Glenn, i Tim Kane. Balance: The Economics of Great Powers from Ancient Rome to Modern America. 1st Simon & Schuster hardcover edition. Simon & Schuster, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.