To cite package ‘prepkit’ in publications use:

  Gong R (2026). _prepkit: Data Normalization and Transformation_. R
  package version 0.1.1, <https://github.com/gonrui/prepkit>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {prepkit: Data Normalization and Transformation},
    author = {Rui Gong},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://github.com/gonrui/prepkit},
  }