Bishop, V. (2001). Landform systems (2nd ed.). Collins Educational.
Citazione stile Chigago Style (17a edizione)Bishop, Victoria. Landform Systems. 2nd ed. London: Collins Educational, 2001.
Citatione MLA (9a ed.)Bishop, Victoria. Landform Systems. 2nd ed. Collins Educational, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.