To cite package ‘T4cluster’ in publications use:

  You K (2021). _T4cluster: Tools for Cluster Analysis_. R package
  version 0.1.2, <https://CRAN.R-project.org/package=T4cluster>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {T4cluster: Tools for Cluster Analysis},
    author = {Kisung You},
    year = {2021},
    note = {R package version 0.1.2},
    url = {https://CRAN.R-project.org/package=T4cluster},
  }