To cite package ‘closecity’ in publications use:

  Henry N, Henry Spatial Analysis (2026). _closecity: Client for the
  'Close' API_. R package version 1.5.0,
  <https://github.com/henryspatialanalysis/closecity-r>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {closecity: Client for the 'Close' API},
    author = {Nathaniel Henry and {Henry Spatial Analysis}},
    year = {2026},
    note = {R package version 1.5.0},
    url = {https://github.com/henryspatialanalysis/closecity-r},
  }