Cita APA (7th ed.)
Travis, C. (2015). Abstract machine: Humanities GIS (First edition.). Esri Press.
Cita Chicago (17th ed.)
Travis, Charles. Abstract Machine: Humanities GIS. First edition. Redlands, California: Esri Press, 2015.
Cita MLA (9th ed.)
Travis, Charles. Abstract Machine: Humanities GIS. First edition. Esri Press, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.