McCullum, H., & Tutu, D. (1995). The angels have left us: The Rwanda tragedy and the churches. The Risk book series.
芝加哥风格引文McCullum, Hugh, 与 Desmond Tutu. "The Angels Have Left Us: The Rwanda Tragedy and the Churches." The Risk Book Series 1995.
MLA引文McCullum, Hugh, 与 Desmond Tutu. "The Angels Have Left Us: The Rwanda Tragedy and the Churches." The Risk Book Series, 1995.
警告：这些引文格式不一定是100％准确.