Ahrens, T. (2002). Grace and reciprocity: Missiological studies. Point.
芝加哥风格引文Ahrens, Theodor. "Grace and Reciprocity: Missiological Studies." Point 2002.
MLA引文Ahrens, Theodor. "Grace and Reciprocity: Missiological Studies." Point, 2002.
警告：这些引文格式不一定是100％准确.