This article incorporates a public domain text (a public domain work of the United States Government) from references Benson A. (2008). Littorina littorea. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. Revision Date: 8/20/2007Benson A. J. (2011). Littorina littorea. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=1009 RevisionDate: 4/21/2009. and CC-BY-2.5 text from the reference Chang A. L., Blakeslee A. M. H., Miller A. W. & Ruiz G. M. (2011). "Establishment Failure in Biological Invasions: A Case History of Littorina littorea in California, USA". PLoS ONE 6(1): e16035. .
