Line, P. (2015). The Vikings and their enemies: Warfare in Northern Europe, 750-1100 (First Skyhorse Publishing edition.). Skyhorse Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Line, Philip. The Vikings and Their Enemies: Warfare in Northern Europe, 750-1100. First Skyhorse Publishing edition. New York, NY: Skyhorse Publishing, 2015.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Line, Philip. The Vikings and Their Enemies: Warfare in Northern Europe, 750-1100. First Skyhorse Publishing edition. Skyhorse Publishing, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.