Pratt, W. T., Woodhall, D. G., Howells, M. F., & Leng, M. J. (1995). Geology of the country around Cadair Idris : memoir for 1:50 000 geological sheet 149 (England and Wales) / W.T. Pratt, D.G. Woodhall and M.F. Howells ; contributors M.J. Leng ... (et al.): Memoir for 1:50 000 geological sheet 149 (England and Wales). HMSO.
Chicago Style (17th ed.) CitationPratt, W. T., D. G. Woodhall, M. F. Howells, and M. J. Leng. Geology of the Country Around Cadair Idris : Memoir for 1:50 000 Geological Sheet 149 (England and Wales) / W.T. Pratt, D.G. Woodhall and M.F. Howells ; Contributors M.J. Leng ... (et Al.): Memoir for 1:50 000 Geological Sheet 149 (England and Wales). London: HMSO, 1995.
MLA (9th ed.) CitationPratt, W. T., et al. Geology of the Country Around Cadair Idris : Memoir for 1:50 000 Geological Sheet 149 (England and Wales) / W.T. Pratt, D.G. Woodhall and M.F. Howells ; Contributors M.J. Leng ... (et Al.): Memoir for 1:50 000 Geological Sheet 149 (England and Wales). HMSO, 1995.