Tube. In S. Butler (Ed.), The Macquarie Dictionary. South Yarra, Australia: Macquarie Dictionary Publishers. Retrieved from http://search.credoreference.com/content/entry/macqdict/tube/0 (2013).

Tube. In S. Butler (Ed.), The Macquarie Dictionary. South Yarra, Australia: Macquarie Dictionary Publishers. Retrieved from http://search.credoreference.com/content/entry/macqdict/tube/0 (2013).