To cite package ‘precisely’ in publications use:

Barrett M (2021). precisely: Estimate Sample Size Based on Precision Rather than Power. R package version 0.1.2.9000, https://github.com/malcolmbarrett/precisely.

Corresponding BibTeX entry:

  @Manual{,
    title = {precisely: Estimate Sample Size Based on Precision Rather
      than Power},
    author = {Malcolm Barrett},
    year = {2021},
    note = {R package version 0.1.2.9000},
    url = {https://github.com/malcolmbarrett/precisely},
  }