Barker, J. E. (1915). Modern Germany: Her political and economic problems, her foreign and domestic policy, her ambitions, and the causes of her successes and of her failures (5th and very greatly enl. ed., completely rev. and brought up to January 1915.). Smith, Elder.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Barker, J. Ellis. Modern Germany: Her Political and Economic Problems, Her Foreign and Domestic Policy, Her Ambitions, and the Causes of Her Successes and of Her Failures. 5th and very greatly enl. ed., completely rev. and brought up to January 1915. London: Smith, Elder, 1915.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Barker, J. Ellis. Modern Germany: Her Political and Economic Problems, Her Foreign and Domestic Policy, Her Ambitions, and the Causes of Her Successes and of Her Failures. 5th and very greatly enl. ed., completely rev. and brought up to January 1915. Smith, Elder, 1915.