Hess, D. (2011). McKnight's physical geography ([Tenth edition], Second California edition.). Learning Solutions.
Citazione stile Chigago Style (17a edizione)Hess, Darrel. McKnight's Physical Geography. [Tenth edition], Second California edition. New York: Learning Solutions, 2011.
Citatione MLA (9a ed.)Hess, Darrel. McKnight's Physical Geography. [Tenth edition], Second California edition. Learning Solutions, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.