Citazione Stile APA (7a Edizione)

Crampton, A., Owen, C., & Widdowson, J. (2016). GCSE 9-1 Geography OCR B ([Student book].). Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Crampton, Andrew, Catherine Owen, e John Widdowson. GCSE 9-1 Geography OCR B. [Student book]. Oxford: Oxford University Press, 2016.

Citatione MLA (9a ed.)

Crampton, Andrew, et al. GCSE 9-1 Geography OCR B. [Student book]. Oxford University Press, 2016.