To cite package ‘hgutils’ in publications use:

  van den Boorn H (2019). _hgutils: Collection of Utility Functions_. R
  package version 0.2.7, <https://github.com/hvdboorn/hgutils>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {hgutils: Collection of Utility Functions},
    author = {H.G. {van den Boorn}},
    year = {2019},
    note = {R package version 0.2.7},
    url = {https://github.com/hvdboorn/hgutils},
  }