A useful article for A Level Economics relating to Factors that influence aggregate supply…
New names of merging junior colleges to be combination of original names http://www.straitstimes.com/singapore/education/new-names-of-merging-junior-colleges-to-be-combination-of-original-names
Edexcel spec reference 2.3.2/3 – Factors that influence aggregate supply
AQA spec reference 22.214.171.124 – The factors which affect long-run AS and distinguish them from those which affect short-run AS.
OCR spec reference Page 20 – Explain why the aggregate supply curve may shift in both the short run and the long run.