Hügel, F. (1939). Essays & addresses on the philosophy of religion: Second series (Cheaper ed.). Dent.
芝加哥风格引文Hügel, Friedrich. Essays & Addresses on the Philosophy of Religion: Second Series. Cheaper ed. London: Dent, 1939.
MLA引文Hügel, Friedrich. Essays & Addresses on the Philosophy of Religion: Second Series. Cheaper ed. Dent, 1939.
警告：这些引文格式不一定是100％准确.