For this assignment, you might be asked to find literature from professional groups or organisations. The best way to do this is through a google search search and limiting the search to a specific domain. 

You can do this by adding the following to your search:

site:edu.au (Limits your search to education organisations in Australia)

site:gov.au (Government organisations in Australia)

site:org.au (This was intented to be used for non-profit and non-commercial organisations, but be careful as it can be used by any organisation).