Cambridge IGCSE And O Level Computer Science Study And Revision Guide Second Edition: Hodder Education Group By Watson, David Williams, Helen By Thriftbooks
Pearson Edexcel International GCSE (9-1) Computer Science Student Book - Ann Weidmann, David Waller, Alex Hadwen-Bennett, Jason Welch, Chris Charles, Shaun Whorton - 9781292310220-2
Pearson Edexcel International GCSE (9-1) Computer Science Student Book - Ann Weidmann, David Waller, Alex Hadwen-Bennett, Jason Welch, Chris Charles, Shaun Whorton - 9781292310220-1