APA (7th ed.) Citation

Hopson, P. M. 1., Aldiss, D. T., & Smith, R. A. (1996). Geology of the country around Hitchin: Memoir for 1:50000 geological sheet 221 (England and Wales) (1. publ.). HMSO.

Chicago Style (17th ed.) Citation

Hopson, Peter M. 19XX-, D. T. Aldiss, and R. A. Smith. Geology of the Country Around Hitchin: Memoir for 1:50000 Geological Sheet 221 (England and Wales). 1. publ. London: HMSO, 1996.

MLA (9th ed.) Citation

Hopson, Peter M. 19XX-, et al. Geology of the Country Around Hitchin: Memoir for 1:50000 Geological Sheet 221 (England and Wales). 1. publ. HMSO, 1996.