To cite Newdistns in publications use:

Saralees Nadarajah, Ricardo Rocha (2016). Newdistns: An R Package for New Families of Distributions. Journal of Statistical Software, 69(10), 1-32.<doi:10.18637/jss.v069.i10>

Corresponding BibTeX entry:

  @Article{,
    title = {{Newdistns}: An {R} Package for New Families of
      Distributions},
    author = {Saralees Nadarajah and Ricardo Rocha},
    journal = {Journal of Statistical Software},
    year = {2016},
    volume = {69},
    number = {10},
    pages = {1--32},
    doi = {10.18637/jss.v069.i10},
  }