To cite skpr in publications use:

  Morgan-Wall T, Khoury G (2021). “Optimal Design Generation and Power
  Evaluation in R: The skpr Package.” _Journal of Statistical
  Software_, *99*(1), 1-36. doi:10.18637/jss.v099.i01
  <https://doi.org/10.18637/jss.v099.i01>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Optimal Design Generation and Power Evaluation in {R}: The {skpr} Package},
    author = {Tyler Morgan-Wall and George Khoury},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {99},
    number = {1},
    pages = {1--36},
    doi = {10.18637/jss.v099.i01},
  }