The following is an example of how to cite the USGS Aquatic Bioassessment Data for the Nation (BioData) (http:\\aquatic.biodata.usgs.gov) website in a publication:

U.S. Geological Survey, [2016], BioData - Aquatic Bioassessment Data for the Nation available on the World Wide Web, accessed [June 10, 2016], at URL http://dx.doi.org/doi:10.5066/F77W698B. 

 

 *Please substitute your year and date, and remove brackets.