ebrary, Inc, & Dawsen, C. J. (2011). Geographic information systems. Nova Science Publishers.
芝加哥风格引文ebrary, Inc, 与 Christopher J. Dawsen. Geographic Information Systems. New York: Nova Science Publishers, 2011.
MLA引文ebrary, Inc, 与 Christopher J. Dawsen. Geographic Information Systems. Nova Science Publishers, 2011.
警告：这些引文格式不一定是100％准确.