Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.
APA Citation Edition CitationGreat Britain. Ordnance Survey. (1956). Ordnance Survey map of Roman Britain (3rd ed.). Ordnance Survey.
Chicago Citation Edition CitationGreat Britain. Ordnance Survey. Ordnance Survey Map of Roman Britain. 3rd ed. Chessington: Ordnance Survey, 1956.
MLA Citation Edition CitationGreat Britain. Ordnance Survey. Ordnance Survey Map of Roman Britain. 3rd ed. Ordnance Survey, 1956.