Citazione Stile APA (7a Edizione)

Witherick, M., & Milner, S. (2010). Edexcel International GCSE geography - Edexcel certificate in geography (1. publ.). Pearson.

Citazione stile Chigago Style (17a edizione)

Witherick, Michael, e Steve Milner. Edexcel International GCSE Geography - Edexcel Certificate in Geography. 1. publ. Harlow, Essex: Pearson, 2010.

Citatione MLA (9a ed.)

Witherick, Michael, e Steve Milner. Edexcel International GCSE Geography - Edexcel Certificate in Geography. 1. publ. Pearson, 2010.