To cite package ‘SampleSplitting’ in publications use:

  Hubbard L, Thompson J (2016). _SampleSplitting: Assists users in
  loading site data and preparing splitting volumes for the lab_. R
  package version 1.0.6, <https://github.com/usgs-r/samplesplitting>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {SampleSplitting: Assists users in loading site data and preparing splitting
volumes for the lab},
    author = {Laura Hubbard and Jessica Thompson},
    year = {2016},
    note = {R package version 1.0.6},
    url = {https://github.com/usgs-r/samplesplitting},
  }