To be made up of:
Ordnance Survey
Year of publication
Title (in italics)
Sheet number and scale (in italics)
Place of publication: publisher
Series
In-text citation:
Archaeological sites are clearly shown (Ordnance Survey, 2002)…
Reference list:
Ordnance Survey. (2002). York (sheet 56, 1:50 000). Southampton: Ordnance Survey (Landranger series).