^"Kendal Group". The BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved January 20, 2019.
^"Kirkby Moor Formation". The BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved January 20, 2019.
The Geological Society (2006). Brenchley, P.J. (ed.). The Geology of England (2. ed.). London: Geological Society Publishing. pp. 124, 127–129. ISBN9781862392007.