To cite package ‘visdat’ in publications use:

  Tierney N (2017). “visdat: Visualising Whole Data Frames.” _JOSS_,
  *2*(16), 355. doi:10.21105/joss.00355
  <https://doi.org/10.21105/joss.00355>,
  <http://dx.doi.org/10.21105/joss.00355>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {visdat: Visualising Whole Data Frames},
    author = {Nicholas Tierney},
    doi = {10.21105/joss.00355},
    url = {http://dx.doi.org/10.21105/joss.00355},
    year = {2017},
    publisher = {Journal of Open Source Software},
    volume = {2},
    number = {16},
    pages = {355},
    journal = {JOSS},
  }