Citazione Stile APA (7a Edizione)

Clarke, C., & Clarke, S. (2018). Human environments (National 4 & 5, second edition.). Hodder Gibson.

Citazione stile Chigago Style (17a edizione)

Clarke, Calvin, e Susie Clarke. Human Environments. National 4 & 5, second edition. Glasgow: Hodder Gibson, 2018.

Citatione MLA (9a ed.)

Clarke, Calvin, e Susie Clarke. Human Environments. National 4 & 5, second edition. Hodder Gibson, 2018.