To cite package sf in publications, please use:

Pebesma, E., 2018. Simple Features for R: Standardized Support for Spatial Vector Data. The R Journal 10 (1), 439-446, https://doi.org/10.32614/RJ-2018-009

Corresponding BibTeX entry:

  @Article{,
    author = {Edzer Pebesma},
    title = {{Simple Features for R: Standardized Support for Spatial
      Vector Data}},
    year = {2018},
    journal = {{The R Journal}},
    doi = {10.32614/RJ-2018-009},
    url = {https://doi.org/10.32614/RJ-2018-009},
    pages = {439--446},
    volume = {10},
    number = {1},
  }