Ball, J. M. (1971). The social sciences and geographic education: A reader. Wiley.
Citazione stile Chigago Style (17a edizione)Ball, John M. The Social Sciences and Geographic Education: A Reader. New York: Wiley, 1971.
Citatione MLA (9a ed.)Ball, John M. The Social Sciences and Geographic Education: A Reader. Wiley, 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.