Snell, J. F. (2004). Bryozoa from the Much Wenlock Limestone (silurian) Formations of the West Midlands and Welsh Borderland. Palaeontographical Soc.
Chicago-Zitierstil (17. Ausg.)Snell, Joanna F. Bryozoa from the Much Wenlock Limestone (silurian) Formations of the West Midlands and Welsh Borderland. London: Palaeontographical Soc, 2004.
MLA-Zitierstil (9. Ausg.)Snell, Joanna F. Bryozoa from the Much Wenlock Limestone (silurian) Formations of the West Midlands and Welsh Borderland. Palaeontographical Soc, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.