Woodward, H. B., Rutley, F., Bristow, H. W., Blake, J. H., Ussher, W. A. E., & Etheridge, R. (1876). Geology of East Somerset and the Bristol coal-fields: Or, Descriptions of the rocks comprised in sheet 19, part of sheet 35, and adjoining portions of sheets 18, 20, and 21, of the (one inch) Geological survey map of England. Printed for H. M. Stationery off..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Woodward, Horace B., Frank Rutley, Henry William Bristow, J. H. Blake, W. A. E. Ussher, و Robert Etheridge. Geology of East Somerset and the Bristol Coal-fields: Or, Descriptions of the Rocks Comprised in Sheet 19, Part of Sheet 35, and Adjoining Portions of Sheets 18, 20, and 21, of the (one Inch) Geological Survey Map of England. London: Printed for H. M. Stationery off., 1876.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Woodward, Horace B., et al. Geology of East Somerset and the Bristol Coal-fields: Or, Descriptions of the Rocks Comprised in Sheet 19, Part of Sheet 35, and Adjoining Portions of Sheets 18, 20, and 21, of the (one Inch) Geological Survey Map of England. Printed for H. M. Stationery off., 1876.