1. Baum, A. and Crosby, N. (2008) Property Investment Appraisal, 3rd edn (Oxford: Blackwell).
2. Davidson, A. (2013) Parry’s Valuation and Investment Tables, 13th edn (London: Estates Gazette).
3. Enever, N., Isaac, D. and Daley, M. (2010) The Valuation of Property Investments, 7th edn (London: Estates Gazette).
4. Investment Property Databank Ltd (2012) IPD UK Annual Property Index (to 31.12.11) (London: IPD). Available in e-format at: http://www.ipd.com