Spence, J. (1862). The American union: Its effect on national character and policy, with an inquiry into secession as a constitutional right, and the causes of the disruption (3rd ed.). London: R. Bentley.

Spence, James. The American Union: Its Effect On National Character and Policy, With an Inquiry Into Secession As a Constitutional Right, and the Causes of the Disruption. 3rd ed. London: R. Bentley, 1862.

Spence, James. The American Union: Its Effect On National Character and Policy, With an Inquiry Into Secession As a Constitutional Right, and the Causes of the Disruption. 3rd ed. London: R. Bentley, 1862.