Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

(1964). Map of Hadrian's wall. Director General of the Ordnance Survey.

Chicago Citation Edition Citation

Map of Hadrian's Wall. Chessington (Surrey): Director General of the Ordnance Survey, 1964.

MLA Citation Edition Citation

Map of Hadrian's Wall. Director General of the Ordnance Survey, 1964.