To cite logitr in publications use:

Helveston JP (2023). “logitr: Fast Estimation of Multinomial and Mixed Logit Models with Preference Space and Willingness-to-Pay Space Utility Parameterizations.” Journal of Statistical Software, 105(10), 1–37. doi:10.18637/jss.v105.i10.

Corresponding BibTeX entry:

  @Article{,
    title = {{logitr}: Fast Estimation of Multinomial and Mixed Logit
      Models with Preference Space and Willingness-to-Pay Space Utility
      Parameterizations},
    author = {John Paul Helveston},
    journal = {Journal of Statistical Software},
    year = {2023},
    volume = {105},
    number = {10},
    pages = {1--37},
    doi = {10.18637/jss.v105.i10},
  }