To cite package ‘TwoPhaseCorR’ in publications use:

  Jha A, Varghese C, Jaggi S, Varghese E, Harun M, Verma M (2025).
  _TwoPhaseCorR: Construct Two-Phase Experimental Designs with
  Correlated Errors_. R package version 1.1.1,
  <https://CRAN.R-project.org/package=TwoPhaseCorR>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {TwoPhaseCorR: Construct Two-Phase Experimental Designs with Correlated Errors},
    author = {Akhilesh Jha and Cini Varghese and Seema Jaggi and Eldho Varghese and Mohd Harun and Med Ram Verma},
    year = {2025},
    note = {R package version 1.1.1},
    url = {https://CRAN.R-project.org/package=TwoPhaseCorR},
  }