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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.