To cite package ‘fcuk’ in publications use:

  Guyader V (2017). _fcuk: The Ultimate Helper for Clumsy Fingers_. R
  package version 0.1.3.1, , <https://github.com/thinkr-open/fcuk>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fcuk: The Ultimate Helper for Clumsy Fingers},
    author = {Vincent Guyader},
    year = {2017},
    note = {R package version 0.1.3.1, 
},
    url = {https://github.com/thinkr-open/fcuk},
  }