APA (7th ed.) Citation

British Geological Survey & Aitkenhead, N. Geology of the country around Garstang : memoir for 1:50000 geological sheet 67 (England and Wales) / N. Aitkenhead ... (et al.): Memoir for 1:50000 geological sheet 67 (England and Wales). HMSO.

Chicago Style (17th ed.) Citation

British Geological Survey and N. Aitkenhead. Geology of the Country Around Garstang : Memoir for 1:50000 Geological Sheet 67 (England and Wales) / N. Aitkenhead ... (et Al.): Memoir for 1:50000 Geological Sheet 67 (England and Wales). London: HMSO.

MLA (9th ed.) Citation

British Geological Survey and N. Aitkenhead. Geology of the Country Around Garstang : Memoir for 1:50000 Geological Sheet 67 (England and Wales) / N. Aitkenhead ... (et Al.): Memoir for 1:50000 Geological Sheet 67 (England and Wales). HMSO.

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