Robinson, J. H., & Beard, C. A. (1927). History of Europe our own times: The eighteenth and nineteenth centuries, the opening of the twentieth century, the world war, and recent events (Rev. ed.). Ginn and Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Robinson, James Harvey, و Charles A. Beard. History of Europe Our Own Times: The Eighteenth and Nineteenth Centuries, the Opening of the Twentieth Century, the World War, and Recent Events. Rev. ed. Boston ; New York, [etc.]: Ginn and Co., 1927.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Robinson, James Harvey, و Charles A. Beard. History of Europe Our Own Times: The Eighteenth and Nineteenth Centuries, the Opening of the Twentieth Century, the World War, and Recent Events. Rev. ed. Ginn and Co., 1927.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.