O'Connor, P. (2008). GIS for A-level geography (First publ. 2008, 1. impr.). Geographical Association.
Citazione stile Chigago Style (17a edizione)O'Connor, Peter. GIS for A-level Geography. First publ. 2008, 1. impr. Sheffield: Geographical Association, 2008.
Citatione MLA (9a ed.)O'Connor, Peter. GIS for A-level Geography. First publ. 2008, 1. impr. Geographical Association, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.