To cite quickmapr:

  Hollister, J.W., Patel, J. (2023). quickmapr: Quickly map and explore
  spatial data. CRAN v0.4.0. 10.5281/zenodo.32971

A BibTeX entry for LaTeX users is

  @Manual{,
    author = {Jeffrey Hollister and Jugal Patel},
    title = {quickmapr: Quickly map and explore spatial data},
    year = {2023},
    note = {R package version 0.4.0, doi: 10.5281/zenodo.32971},
    url = {https://github.com/geogugal/quickmapr},
  }