APA (7th ed.) Citation

Smith, B., & George, T. N. (1935). British regional geology: North Wales. H. M. Stationery off.

Chicago Style (17th ed.) Citation

Smith, Bernard, and Thomas Neville George. British Regional Geology: North Wales. London: H. M. Stationery off, 1935.

MLA (9th ed.) Citation

Smith, Bernard, and Thomas Neville George. British Regional Geology: North Wales. H. M. Stationery off, 1935.