To cite 'multitaper' in publications please use:

Rahim KJ, Burr WS, Thomson DJ (2014). Applications of Multitaper Spectral Analysis to Nonstationary Data. Ph.D. thesis, Queen's University. R package version 1.0-15, https://CRAN.R-project.org/package=multitaper.

Corresponding BibTeX entry:

  @PhdThesis{,
    title = {Applications of Multitaper Spectral Analysis to
      Nonstationary Data},
    chapter = {Appendix A: Multitaper R Package},
    author = {Karim J Rahim and Wesley S Burr and David J Thomson},
    year = {2014},
    note = {R package version 1.0-15},
    pages = {149--183},
    school = {Queen's University},
    url = {https://CRAN.R-project.org/package=multitaper},
  }