Bolstad, P. (2016). GIS fundamentals: A first text on geographic information systems (5th ed.). XanEdu Eider Press.
芝加哥风格引文Bolstad, Paul. GIS Fundamentals: A First Text on Geographic Information Systems. 5th ed. Acton, MA : White Bear Lake, Minnesota: XanEdu Eider Press, 2016.
MLA引文Bolstad, Paul. GIS Fundamentals: A First Text on Geographic Information Systems. 5th ed. XanEdu Eider Press, 2016.
警告：这些引文格式不一定是100％准确.