DO NOT rely on Google to locate legal information. It may not always be clear to which jurisdiction a webpage relates. Equally important - how current is the webpage? Has the legal case you are reading been appealed to a higher court or been overturned?
The websites below are highly recommended.
The Oxford University Press Online Resources Centre contains chapter updates and useful articles and weblinks for a range employment Law books, including Cabrelli - Employment Law in Context, Selwyn's Law of Employment and others.