To cite package ‘ICC.Sample.Size’ in publications use:

  Rathbone A, Shaw S, Kumbhare D (2026). _ICC.Sample.Size: Calculation
  of Sample Size and Power for ICC_. R package version 1.1,
  <https://CRAN.R-project.org/package=ICC.Sample.Size>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ICC.Sample.Size: Calculation of Sample Size and Power for ICC},
    author = {Alasdair Rathbone and Saurabh Shaw and Dinesh Kumbhare},
    year = {2026},
    note = {R package version 1.1},
    url = {https://CRAN.R-project.org/package=ICC.Sample.Size},
  }