These notes look at the individual's (short run) and the industry's (long run) supply of labour and the concept of elasticity of labour supply.
s-cool notes: http://s-cool.co.uk/alevel/economics/labour-markets/the-supply-of-labour.html
tutor2u notes: http://www.tutor2u.net/economics/revision-notes/a2-micro-supply-of-labour.html