ebrary, Inc, & Dawsen, C. J. (2011). Geographic information systems. Nova Science Publishers.
Chicago Style (17th ed.) Citationebrary, Inc, and Christopher J. Dawsen. Geographic Information Systems. New York: Nova Science Publishers, 2011.
MLA引文ebrary, Inc, and Christopher J. Dawsen. Geographic Information Systems. Nova Science Publishers, 2011.
警告:這些引文格式不一定是100%准確.