Nygren, A. (1960). Essence of Christianity: Two essays. William B. Eerdmans Publishing Co..
芝加哥风格引文Nygren, Anders. Essence of Christianity: Two Essays. Grand Rapids: William B. Eerdmans Publishing Co., 1960.
MLA引文Nygren, Anders. Essence of Christianity: Two Essays. William B. Eerdmans Publishing Co., 1960.
警告：这些引文格式不一定是100％准确.