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APA Citation
Attwood, G., Barraclough, J., Bettison, I., Macpherson, A., Moran, B., Nicholson, S., Pledger, K., Smith, H., Staley, G., Ward-Penny, R., Wilkins, D., Oliver, D., & Petran, J. (2017). Edexcel AS and A level Mathematics Pure Mathematics Year 1/AS Textbook. Harlow : Pearson Education. http://access.bl.uk/ark:/81055/vdc_100125153400.0x000001