To cite package ‘slowraker’ in publications use:

  Baker C (2017). _slowraker: A Slow Version of the Rapid Automatic
  Keyword Extraction (RAKE) Algorithm_. R package version 0.1.1,
  <https://CRAN.R-project.org/package=slowraker>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {slowraker: A Slow Version of the Rapid Automatic Keyword Extraction (RAKE)
Algorithm},
    author = {Christopher Baker},
    year = {2017},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=slowraker},
  }