1. ABS (2007) Retail and Wholesale Industries 2005–06, August 2007, catalogue 8622.0.
2. ABS (2008) Australian Social Trends 2008, Article: Trade Union Members July 2008, catalogue 4102.0.
3. ABS (2009a) Employee Earnings, Benefi ts and Trade Union Membership, April 2009, catalogue 6310.0.
4. ABS (2009b) Labour Force, Australia, Detailed Quarterly, February 2009, catalogue 6291.0.55.003, Table 5.
5. ABS (2009c) Australian Labour Market Statistics, April 2009, catalogue 6105.0