Varden, E. (2011). Redeeming freedom: The principle of servitude in Bérulle Studia Anselmiana.
芝加哥风格引文Varden, Erik. "Redeeming Freedom: The Principle of Servitude in Bérulle." Studia Anselmiana 2011.
MLA引文Varden, Erik. "Redeeming Freedom: The Principle of Servitude in Bérulle." Studia Anselmiana, 2011.
警告：这些引文格式不一定是100％准确.