Johnson, P. H. (1968). The survival of the fittest. Macmillan.
芝加哥风格引文Johnson, Pamela Hansford. The Survival of the Fittest. London, Melbourne [etc.]: Macmillan, 1968.
MLA引文Johnson, Pamela Hansford. The Survival of the Fittest. Macmillan, 1968.
警告：这些引文格式不一定是100％准确.