Bell, R. (1968). The origin of islam in its christian enviroment. Univ Press.
芝加哥风格引文Bell, Richard. The Origin of Islam in Its Christian Enviroment. Edinburgh: Univ Press, 1968.
MLA引文Bell, Richard. The Origin of Islam in Its Christian Enviroment. Univ Press, 1968.
警告：这些引文格式不一定是100％准确.