To cite package ‘psdr’ in publications use:

  Cheng Y (2021). _psdr: Use Time Series to Generate and Compare Power
  Spectral Density_. R package version 1.0.1,
  <https://CRAN.R-project.org/package=psdr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {psdr: Use Time Series to Generate and Compare Power Spectral Density},
    author = {Yong-Han Hank Cheng},
    year = {2021},
    note = {R package version 1.0.1},
    url = {https://CRAN.R-project.org/package=psdr},
  }