Foot, S. (2011). Æthelstan: The first king of England. Yale University Press.
芝加哥风格引文Foot, Sarah. Æthelstan: The First King of England. New Haven: Yale University Press, 2011.
MLA引文Foot, Sarah. Æthelstan: The First King of England. Yale University Press, 2011.
警告：这些引文格式不一定是100％准确.