Tondorf, F. A. (1920). Anniversary tribute to George Martin Kober: In celebration of his seventieth birthday by his friends and associates, March 28, 1920.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tondorf, Francis A. Anniversary Tribute to George Martin Kober: In Celebration of His Seventieth Birthday by His Friends and Associates, March 28, 1920. Washington, D.C, 1920.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Tondorf, Francis A. Anniversary Tribute to George Martin Kober: In Celebration of His Seventieth Birthday by His Friends and Associates, March 28, 1920. 1920.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.