To cite package ‘mlogit’ in publications use:

  Croissant Y (2020). _mlogit: Multinomial Logit Models_. R package
  version 1.0-3, , <https://r-forge.r-project.org/projects/mlogit>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mlogit: Multinomial Logit Models},
    author = {Yves Croissant},
    year = {2020},
    note = {R package version 1.0-3, 
},
    url = {https://r-forge.r-project.org/projects/mlogit},
  }