APA (7th ed.) Citation

British Geological Survey. (1977). British Geological Survey 1: 250000 series.

Chicago Style (17th ed.) Citation

British Geological Survey. British Geological Survey 1: 250000 Series. London, 1977.

MLA (9th ed.) Citation

British Geological Survey. British Geological Survey 1: 250000 Series. 1977.

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