- Wessel, Paul. "The GMT Home Page". Honolulu, HI, US: School of Ocean and Earth Science and Technology (SOEST). Diarsipkan dari versi asli tanggal 2013-08-22. Diakses tanggal January 27, 2012.
- "planiglobe - online vector map creation". Kiel, Germany: kk+w - digitale kartografie GmbH. September 2, 2008. Diarsipkan dari versi asli tanggal 2012-02-04. Diakses tanggal January 27, 2012. Interactive online map generation using GMT.
- Phillips, Doug (September 11, 2003). "GMT (Generic Mapping Tools)". Calgary, Alberta, Canada: University of Calgary. Diarsipkan dari versi asli tanggal 2012-08-06. Diakses tanggal January 27, 2012. Some examples.
- Becker, Thorsten W. (January 24, 2012). "iGMT Project". Faculty pages for Thorsten Becker - Associate Professor of Earth Sciences. Los Angeles, CA, US: Department of Earth Sciences, Dana and David Dornsife College of Letters, Arts and Sciences, USC. Diarsipkan dari versi asli tanggal 2013-06-24. Diakses tanggal January 27, 2012. iGMT is a graphical front-end for GMT.