Gibson, W. (1913). The concealed coalfield of Yorkshire and Nottinghamshire: By Walcot Gibson. H. M. Stationery Office.
Chicago-Zitierstil (17. Ausg.)Gibson, Walcot. The Concealed Coalfield of Yorkshire and Nottinghamshire: By Walcot Gibson. London: H. M. Stationery Office, 1913.
MLA-Zitierstil (9. Ausg.)Gibson, Walcot. The Concealed Coalfield of Yorkshire and Nottinghamshire: By Walcot Gibson. H. M. Stationery Office, 1913.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.