To cite package ‘choiceDes’ in publications use:

  Horne J (2018). _choiceDes: Design Functions for Choice Studies_. R
  package version 0.9-3,
  <https://CRAN.R-project.org/package=choiceDes>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {choiceDes: Design Functions for Choice Studies},
    author = {Jack Horne},
    year = {2018},
    note = {R package version 0.9-3},
    url = {https://CRAN.R-project.org/package=choiceDes},
  }