To cite both the mctest related paper and the mctest package:

Imdad Ullah, M. and Aslam, M. (2026). mctest: Multicollinearity Diagnostic Measures. R package version 1.3.2. <https://CRAN.R-project.org/package=mctest>

Imdadullah, M., Aslam, M. and Altaf, S. (2016). mctest: An R Package for Deteection of Collinearity among Regressors. The R Journal, 8(2), Pages 495--505, <https://journal.r-project.org/articles/RJ-2016-062/index.html>.

Imdad Ullah, M. Aslam, M., Altaf, S. and Ahmed, Munir, (2019). Some New Diagnostics of Multicollinearity in Linear Regression Model. Sains Malaysiana, 48(9),Pages 2051--2060, <http://dx.doi.org/10.17576/jsm-2019-4809-26>.

Corresponding BibTeX entries:

  @Manual{,
    title = {mctest: Multicollinearity Diagnostic Measures},
    author = {Imdad Ullah Muhammad and Aslam Muhammad},
    year = {2026},
    note = {R package version 1.3.2},
    url = {https://CRAN.R-project.org/package=mctest},
  }

  @Article{,
    title = {mctest: An R Package for Deteection of Collinearity among
      Regressors},
    author = {Imdadullah Muhammad and Aslam Muhammad and Altaf Saima},
    journal = {The R Journal},
    year = {2016},
    volume = {8(2)},
    pages = {495-505},
    url =
      {https://journal.r-project.org/articles/RJ-2016-062/index.html},
  }

  @Article{,
    title = {Some New Diagnostics of Multicollinearity in Linear
      Regression Model},
    author = {Imdad Ullah Muhammad and Aslam Muhammad and Altaf Saima
      and Munir Ahmed},
    journal = {Sains Malaysiana},
    year = {2019},
    volume = {48(9)},
    pages = {2051-2060},
    url = {http://dx.doi.org/10.17576/jsm-2019-4809-26},
  }