Heywood, I., Cornelius, S., & Carver, S. (2010). Introduction to geographical information systems (3rd ed.). Pearson.
Citazione stile Chigago Style (17a edizione)Heywood, Ian, Sarah Cornelius, e Steve Carver. Introduction to Geographical Information Systems. 3rd ed. New Delhi: Pearson, 2010.
Citatione MLA (9a ed.)Heywood, Ian, et al. Introduction to Geographical Information Systems. 3rd ed. Pearson, 2010.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.