APA (7th ed.) Citation

Great Britain. Ordnance Survey. (1930). Trinidad. The Survey.

Chicago Style (17th ed.) Citation

Great Britain. Ordnance Survey. Trinidad. Southampton: The Survey, 1930.

MLA (9th ed.) Citation

Great Britain. Ordnance Survey. Trinidad. The Survey, 1930.

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