Nehls, G. (1987). Christians ask muslims. Evangelical Mission Press.
芝加哥风格引文Nehls, Gerhard. Christians Ask Muslims. Bellville: Evangelical Mission Press, 1987.
MLA引文Nehls, Gerhard. Christians Ask Muslims. Evangelical Mission Press, 1987.
警告：这些引文格式不一定是100％准确.