To be made up of:
Corporate author and publisher
Year of publication
Title (in italics)
Sheet number and scale (in italics)
Publication details
Series
In-text citation:
The landscape has changed quite considerably (Ordnance Survey, 1988)…
Reference list:
Ordnance Survey. (1988). Castleford (solid (sheet 16, 1:50 000)). Southampton: Ordnance Survey (Geological Survey of Great Britain [England and Wales]).