Dorling Kindersley Multimedia. (1997). Encyclopedia of nature (Version 2.0, CD-ROM for Macintosh & Windows.). DK Multimedia.
芝加哥风格引文Dorling Kindersley Multimedia. Encyclopedia of Nature. Version 2.0, CD-ROM for Macintosh & Windows. New York: DK Multimedia, 1997.
MLA引文Dorling Kindersley Multimedia. Encyclopedia of Nature. Version 2.0, CD-ROM for Macintosh & Windows. DK Multimedia, 1997.
警告：这些引文格式不一定是100％准确.