To cite package ‘designsize’ in publications use:

Bhattacharjee A, Dey R, Halder S, Pawar A (2021). designsize: Sample Size Calculation of Various Study Designs. R package version 0.1.0, https://CRAN.R-project.org/package=designsize.

Corresponding BibTeX entry:

  @Manual{,
    title = {designsize: Sample Size Calculation of Various Study
      Designs},
    author = {Atanu Bhattacharjee and Rajashree Dey and Soutik Halder
      and Akash Pawar},
    year = {2021},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=designsize},
  }