Bull, G. T. (1955). When iron gates yield ([1st ed. reprinted].). Pickering and Inglis.
芝加哥风格引文Bull, Geoffrey T. When Iron Gates Yield. [1st ed. reprinted]. London: Pickering and Inglis, 1955.
MLA引文Bull, Geoffrey T. When Iron Gates Yield. [1st ed. reprinted]. Pickering and Inglis, 1955.
警告：这些引文格式不一定是100％准确.