1. Aksiyon. (2006) Özel güvenlik krizde [Private security in crisis]. Turkish Weekly News Magazine, 6 January,
http://www.aksiyon.com.tr/aksiyon/haber-12873-34-ozel-guvenlik-krizde.html
, accessed 15 September 2008.
2. Aydin, A.H. (1996) Private and voluntary policing service in Turkey. Security Journal 7 (2): 129–133.
3. Button, M. (2007) Security Officers and Policing: Powers, Culture and Control in the Governance of Private Space. Hampshire, England: Ashgate Publishing.
4. Button, M. and George, B. (2006) Regulation of private security: Models for analysis. In: M. Gill (ed.) The Handbook of Security. Basingstoke: Palgrave Macmillan, pp. 563–585.
5. Button, M., Park, H. and Lee, J. (2006) The private security industry in South Korea: A familiar tale of growth, gaps and the need for better regulation. Security Journal 19 (3): 167–179.