APA (7th ed.) Citation

British Geological Survey & Wilson, D. (1990). Geology of the South Wales Coalfield memoir for 1:50 000 geological sheet 261 and 262 (England and Wales) / D. Wilson... [et al.]: Memoir for 1:50 000 geological sheet 261 and 262 (England and Wales) (2nd ed.). HMSO.

Chicago Style (17th ed.) Citation

British Geological Survey and D. Wilson. Geology of the South Wales Coalfield Memoir for 1:50 000 Geological Sheet 261 and 262 (England and Wales) / D. Wilson... [et Al.]: Memoir for 1:50 000 Geological Sheet 261 and 262 (England and Wales). 2nd ed. HMSO, 1990.

MLA (9th ed.) Citation

British Geological Survey and D. Wilson. Geology of the South Wales Coalfield Memoir for 1:50 000 Geological Sheet 261 and 262 (England and Wales) / D. Wilson... [et Al.]: Memoir for 1:50 000 Geological Sheet 261 and 262 (England and Wales). 2nd ed. HMSO, 1990.

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