APA (7th ed.) Citation

England. Ordnance Survey Office. (1912). Ordnance Survey map of Belfast district. Ordnance Survey.

Chicago Style (17th ed.) Citation

England. Ordnance Survey Office. Ordnance Survey Map of Belfast District. Southampton: Ordnance Survey, 1912.

MLA (9th ed.) Citation

England. Ordnance Survey Office. Ordnance Survey Map of Belfast District. Ordnance Survey, 1912.

Warning: These citations may not always be 100% accurate.