ebrary, Inc, & Francis, R. G. (1958). The population ahead. University of Minnesota Press.
芝加哥风格引文ebrary, Inc, 与 Roy G. Francis. The Population Ahead. Minneapolis: University of Minnesota Press, 1958.
MLA引文ebrary, Inc, 与 Roy G. Francis. The Population Ahead. University of Minnesota Press, 1958.
警告：这些引文格式不一定是100％准确.