To cite package ‘dhh’ in publications use:

  Tang R (2018). _dhh: A Heavy-Headed Distribution_. R package version
  0.0.1, <https://CRAN.R-project.org/package=dhh>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {dhh: A Heavy-Headed Distribution},
    author = {Runlong Tang},
    year = {2018},
    note = {R package version 0.0.1},
    url = {https://CRAN.R-project.org/package=dhh},
  }