See Bus Operator Handbook(PDF). Melbourne: Bus Industry Confederation (BIC) and the National Transport Commission (NTC) (Australia). 2005. p. 29. Archived from the original(PDF) on 21 March 2012. Retrieved 8 January 2012.
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See Bus Operator Handbook(PDF). Melbourne: Bus Industry Confederation (BIC) and the National Transport Commission (NTC) (Australia). 2005. p. 29. Archived from the original(PDF) on 21 March 2012. Retrieved 8 January 2012.