To cite package ‘valaddin’ in publications use:

  Ha E (2024). _valaddin: Functional Input Validation_. R package
  version 1.0.2, <https://github.com/egnha/valaddin>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {valaddin: Functional Input Validation},
    author = {Eugene Ha},
    year = {2024},
    note = {R package version 1.0.2},
    url = {https://github.com/egnha/valaddin},
  }