To cite package ‘wand’ in publications use:

  Rudis B (2019). _wand: Retrieve Magic Attributes from Files and
  Directories_. R package version 0.6.0,
  <https://gitlab.com/hrbrmstr/wand>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {wand: Retrieve Magic Attributes from Files and Directories},
    author = {Bob Rudis},
    year = {2019},
    note = {R package version 0.6.0},
    url = {https://gitlab.com/hrbrmstr/wand},
  }