Ober, J., Carnes, M. C., & Norman, N. J. (2016). The threshold of democracy: Thens in 403 b.c. (Fourth edition.). W.W. Norton & Company.

Ober, Josiah, Mark C. Carnes, and Naomi J. Norman. The Threshold of Democracy: Thens in 403 B.c. Fourth edition. New York: W.W. Norton & Company, 2016.

Ober, Josiah, et al. The Threshold of Democracy: Thens in 403 B.c. Fourth edition. W.W. Norton & Company, 2016.