Não informado. (1839). Memoirs of the Geological Survey of the United Kingdon. Institute of Geological Sciences.
Chicago-Zitierstil (17. Ausg.)Não informado. Memoirs of the Geological Survey of the United Kingdon. London: Institute of Geological Sciences, 1839.
MLA-Zitierstil (8. Ausg.)Não informado. Memoirs of the Geological Survey of the United Kingdon. Institute of Geological Sciences, 1839.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.
