ebrary, Inc. (1993). National issues in science and technology, 1993. National Academy Press.
芝加哥风格引文ebrary, Inc. National Issues in Science and Technology, 1993. Washington, DC: National Academy Press, 1993.
MLA引文ebrary, Inc. National Issues in Science and Technology, 1993. National Academy Press, 1993.
警告：这些引文格式不一定是100％准确.