To cite the R6DS package, please use:

Yang Y (2019). R6DS: R6 Reference Class Based Data Structures. doi:10.32614/CRAN.package.R6DS. R package version 1.2.0, https://CRAN.R-project.org/package=R6DS.

Corresponding BibTeX entry:

  @Manual{,
    title = {R6DS: R6 Reference Class Based Data Structures},
    author = {Yukai Yang},
    year = {2019},
    note = {R package version 1.2.0},
    doi = {10.32614/CRAN.package.R6DS},
    url = {https://CRAN.R-project.org/package=R6DS},
  }