Citazione Stile APA (7a Edizione)

Campbell, C., & Geddes, I. (2019). Geography, physical and human environments (Higher, second edition.). Hodder Gibson.

Citazione stile Chigago Style (17a edizione)

Campbell, Calum, e Ian Geddes. Geography, Physical and Human Environments. Higher, second edition. Glasgow: Hodder Gibson, 2019.

Citatione MLA (9a ed.)

Campbell, Calum, e Ian Geddes. Geography, Physical and Human Environments. Higher, second edition. Hodder Gibson, 2019.