Παραπομπή APA

O'Sullivan, D., & Unwin, D. J. (2003). Geographical information analysis. John Wiley & Sons.

Παραπομπή Chicago Style

O'Sullivan, David, και David J. Unwin. Geographical Information Analysis. New Jersey: John Wiley & Sons, 2003.

Παραπομπή MLA

O'Sullivan, David, και David J. Unwin. Geographical Information Analysis. John Wiley & Sons, 2003.