Attenborough, D. (1979). Life on Earth: A natural history (1st American edition.). Little, Brown.
芝加哥风格引文Attenborough, David. Life on Earth: A Natural History. 1st American edition. Boston: Little, Brown, 1979.
MLA引文Attenborough, David. Life on Earth: A Natural History. 1st American edition. Little, Brown, 1979.
警告：这些引文格式不一定是100％准确.