Norwich, J. J. (2017). Four princes: Henry VIII, Francis I, Charles V, Suleiman the Magnificent and the obsessions that forged modern Europe (First Grove Atlantic hardcover edition.). Atlantic Monthly Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Norwich, John Julius. Four Princes: Henry VIII, Francis I, Charles V, Suleiman the Magnificent and the Obsessions That Forged Modern Europe. First Grove Atlantic hardcover edition. New York: Atlantic Monthly Press, 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Norwich, John Julius. Four Princes: Henry VIII, Francis I, Charles V, Suleiman the Magnificent and the Obsessions That Forged Modern Europe. First Grove Atlantic hardcover edition. Atlantic Monthly Press, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.