To cite package ‘NitrogenUptake2016’ in publications use:

  Hill TD, Sommer NR, Kanaskie CR, Santos EA, Oczkowski AJ (2018).
  “Nitrogen and carbon concentrations and stable isotope ratios: data
  from a ^15^N tracer study in short-form _Spartina alterniflora_ and
  _Distichlis spicata_.” _Data In Brief_, *21*, 466-472.
  doi:10.1016/j.dib.2018.09.133
  <https://doi.org/10.1016/j.dib.2018.09.133>,
  <https://github.com/troyhill/NitrogenUptake2016>.

A BibTeX entry for LaTeX users is

  @Article{,
    journal = {Data In Brief},
    title = {Nitrogen and carbon concentrations and stable isotope ratios: data from a ^15^N tracer study in short-form _Spartina alterniflora_ and _Distichlis spicata_},
    doi = {10.1016/j.dib.2018.09.133},
    volume = {21},
    pages = {466-472},
    author = {Troy D. Hill and Nathalie R. Sommer and Caroline R. Kanaskie and Emily A. Santos and Autumn J. Oczkowski},
    address = {Narragansett, RI},
    year = {2018},
    url = {https://github.com/troyhill/NitrogenUptake2016},
  }