To cite package ‘echelon’ in publications use:

  Ishioka F (2025). _echelon: The Echelon Analysis and the Detection of
  Spatial Clusters using Echelon Scan Method_. R package version 0.3.0,
  <https://CRAN.R-project.org/package=echelon>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {echelon: The Echelon Analysis and the Detection of Spatial Clusters using
Echelon Scan Method},
    author = {Fumio Ishioka},
    year = {2025},
    note = {R package version 0.3.0},
    url = {https://CRAN.R-project.org/package=echelon},
  }