APA (7th ed.) Citation

Widdowson, J. (2011). GCSE Geography OCR B (1. publ.). Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Widdowson, John. GCSE Geography OCR B. 1. publ. Oxford: Oxford Univ. Press, 2011.

MLA (9th ed.) Citation

Widdowson, John. GCSE Geography OCR B. 1. publ. Oxford Univ. Press, 2011.

Warning: These citations may not always be 100% accurate.