Swanwick, H. M. (1938). The roots of peace: A sequel to Collective insecurity, being an essay on some of the uses, conditions and limitations of compulsive force in the prevention of war. Cape.

Swanwick, Helena M. The Roots of Peace: A Sequel to Collective Insecurity, Being an Essay on Some of the Uses, Conditions and Limitations of Compulsive Force in the Prevention of War. London: Cape, 1938.

Swanwick, Helena M. The Roots of Peace: A Sequel to Collective Insecurity, Being an Essay on Some of the Uses, Conditions and Limitations of Compulsive Force in the Prevention of War. Cape, 1938.