To cite newmark in publications use:

  Verri Kozlowski A (2026). _newmark: Uncertainty Analysis in Dynamic
  Site and Slope Response_. R package version 1.1.0,
  <https://github.com/averriK/newmark>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{newmark}: Uncertainty Analysis in Dynamic Site and Slope Response},
    author = {Alejandro {Verri Kozlowski}},
    year = {2026},
    note = {R package version 1.1.0},
    url = {https://github.com/averriK/newmark},
  }