citHeader("To cite dataRetrieval in publications, please use:")

citEntry(entry = "book",
 author = personList(
              as.person("Robert M. Hirsch"),
              as.person("Laura A. De Cicco")),
  title = "User guide to Exploration and Graphics for RivEr Trends (EGRET) and dataRetrieval: R packages for hydrologic data",
  publisher = "U.S. Geological Survey Techniques and Methods",
  year = "2015",
  url = "http://pubs.usgs.gov/tm/04/a10/",
  textVersion = "Hirsch, R.M., and De Cicco, L.A., 2015, User guide to Exploration and Graphics for RivEr Trends (EGRET) and dataRetrieval: R packages for hydrologic data (version 2.0, February 2015): U.S. Geological Survey Techniques and Methods book 4, chap. A10, 93 p., http://dx.doi.org/10.3133/tm4A10"
)