Improving the energy efficiency of our buildings : a guide to display energy certificates and advisory reports for public buildings.
Great Britain.Department for Communities and Local Government.
London : Department for Communities and Local Government,
2008.
"The energy performance of buildings (certificates and inspections)(England and Wales) regulations 2007 SI 2007/991, amended by SI 2007/1669, SI 2008/647."
"May 2008."