Travis, C. (2015). Abstract machine: Humanities GIS (First edition.). Esri Press.
芝加哥风格引文Travis, Charles. Abstract Machine: Humanities GIS. First edition. Redlands, California: Esri Press, 2015.
MLA引文Travis, Charles. Abstract Machine: Humanities GIS. First edition. Esri Press, 2015.
警告：这些引文格式不一定是100％准确.