Geography, D. o. (2019). Principles of Geographic Information Sytem. Obafemi Awolowo University.
Citazione stile Chigago Style (17a edizione)Geography, Department of. Principles of Geographic Information Sytem. Obafemi Awolowo University, 2019.
Citatione MLA (9a ed.)Geography, Department of. Principles of Geographic Information Sytem. Obafemi Awolowo University, 2019.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.