Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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