Bolstad, P. GIS fundamentals: A first text on geographic information systems (4a ed.).
芝加哥风格引文Bolstad, Paul. GIS Fundamentals: A First Text on Geographic Information Systems. 4a ed.
MLA引文Bolstad, Paul. GIS Fundamentals: A First Text on Geographic Information Systems. 4a ed.
警告：这些引文格式不一定是100％准确.