To cite the dr package in publications use:

Weisberg S (2002). “Dimension reduction regression in R.” Journal of Statistical Software. https://doi.org/10.18637/jss.v007.i01.

Corresponding BibTeX entry:

  @Article{,
    title = {Dimension reduction regression in {R}},
    author = {S. Weisberg},
    year = {2002},
    journal = {Journal of Statistical Software},
    url = {https://doi.org/10.18637/jss.v007.i01},
  }