To cite EGRET in publications, please use:

Hirsch RM, De Cicco LA (2015). “User guide to Exploration and Graphics for RivEr Trends (EGRET) and dataRetrieval: R packages for hydrologic data.” In Techniques and Methods, chapter A10. U.S. Geological Survey, Reston, VA. https://pubs.usgs.gov/tm/04/a10/.

Corresponding BibTeX entry:

  @InBook{,
    author = {Robert M. Hirsch and 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},
    address = {Reston, VA},
    booktitle = {Techniques and Methods},
    institution = {U.S. Geological Survey},
    year = {2015},
    chapter = {A10},
    url = {https://pubs.usgs.gov/tm/04/a10/},
  }