Interesting article for Economics Students relating to Price Determination:
Top cotton buyers flock to India as hurricanes hit US crop – http://economictimes.indiatimes.com/articleshow/60515811.cms?utm_source=contentofinterest&utm_medium=text&utm_campaign=cppst
Edexcel spec reference  – 1.2.6 Price determination 
AQA spec reference – 3.1.2.5 The determination of equilibrium market prices
OCR spec reference – Page 8  Supply and demand and the interaction of markets