O'Sullivan, D., & Unwin, D. J. (2003). Geographical information analysis. John Wiley & Sons.
Chicago Style aipamenaO'Sullivan, David, and David J. Unwin. Geographical Information Analysis. New Jersey: John Wiley & Sons, 2003.
MLA aipamenaO'Sullivan, David, and David J. Unwin. Geographical Information Analysis. John Wiley & Sons, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.