1. Alder, J. 2005. Constitutional and administrative law. Hampshire: Palgrave Macmillan.
2. Aler, G.P.A. 1982. De politiebevoegdheid bij opsporing en controle. Zwolle: W.E.J. Tjeenk Willink.
3. Alfen, Sameer van. 2011. Fiscus Bespioneert Leaserijders. De Telegraaf, February 11
4. Australian Government. 1990. Data-matching program (Assistance and Tax) Act 1990. In C2006C00591.
5. Batey, Angus. 2011. Welcome to Royston … You’re under surveillance. Guardian, June 29.