Great Britain Dept. of the Environment. (1992). Planning policy guidance: Development plans and regional planning guidance. HMSO.
Παραπομπή σε μορφή Chicago (17η εκδ.)Great Britain Dept. of the Environment. Planning Policy Guidance: Development Plans and Regional Planning Guidance. London: HMSO, 1992.
Παραπομπή σε μορφή MLA (9th εκδ.)Great Britain Dept. of the Environment. Planning Policy Guidance: Development Plans and Regional Planning Guidance. HMSO, 1992.
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