To cite package ‘CovTools’ in publications use:

  Lee K, You K (2021). _CovTools: Statistical Tools for Covariance
  Analysis_. R package version 0.5.4,
  <https://CRAN.R-project.org/package=CovTools>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {CovTools: Statistical Tools for Covariance Analysis},
    author = {Kyoungjae Lee and Kisung You},
    year = {2021},
    note = {R package version 0.5.4},
    url = {https://CRAN.R-project.org/package=CovTools},
  }