Cloonan, Martin; Frith, Simon (2010). Promoting Business – DF Concerts(PDF) (Report). University of Glasgow. Archived from the original(PDF) on 3 October 2015. Retrieved 2 October 2015.
Cloonan, Martin; Frith, Simon (2010). Promoting Business – DF Concerts(PDF) (Report). University of Glasgow. Archived from the original(PDF) on 3 October 2015. Retrieved 2 October 2015.