APA (7th ed.) Citation

British Geological Survey, Hopson, P. M., Aldiss, D. T., & Smith, A. (1996). Geology of the country around Hitchin : memoir for 1:50 000 geological sheet 221 (England and Wales) / P.M. Hopson, D.T. Aldiss, A. Smith: Memoir for 1:50 000 geological sheet 221 (England and Wales). HMSO.

Chicago Style (17th ed.) Citation

British Geological Survey, P. M. Hopson, D. T. Aldiss, and A. Smith. Geology of the Country Around Hitchin : Memoir for 1:50 000 Geological Sheet 221 (England and Wales) / P.M. Hopson, D.T. Aldiss, A. Smith: Memoir for 1:50 000 Geological Sheet 221 (England and Wales). London: HMSO, 1996.

MLA (9th ed.) Citation

British Geological Survey, et al. Geology of the Country Around Hitchin : Memoir for 1:50 000 Geological Sheet 221 (England and Wales) / P.M. Hopson, D.T. Aldiss, A. Smith: Memoir for 1:50 000 Geological Sheet 221 (England and Wales). HMSO, 1996.

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