APA (7th ed.) Citation

Great Britain. Fuel Research Board. (1939). The Northumberland and Durham Coalfield: Northumberland area : the Bensham Seam. H.M.S.O..

Chicago Style (17th ed.) Citation

Great Britain. Fuel Research Board. The Northumberland and Durham Coalfield: Northumberland Area : The Bensham Seam. London: H.M.S.O., 1939.

MLA (8th ed.) Citation

Great Britain. Fuel Research Board. The Northumberland and Durham Coalfield: Northumberland Area : The Bensham Seam. H.M.S.O., 1939.