To cite randomizr in a publication, cite the package itself. The design framework it belongs to is described in Blair et al. (2019). The algorithms behind particular functions are cited on their own help pages; see ?balanced_ra in particular.

Coppock A (2026). randomizr: Easy-to-Use Tools for Common Forms of Random Assignment and Sampling. R package version 2.0.1, https://declaredesign.org/r/randomizr/.

Blair G, Cooper J, Coppock A, Humphreys M (2019). “Declaring and Diagnosing Research Designs.” American Political Science Review, 113(3), 838–859. doi:10.1017/S0003055419000194.

Corresponding BibTeX entries:

  @Manual{,
    title = {randomizr: Easy-to-Use Tools for Common Forms of Random
      Assignment and Sampling},
    author = {Alexander Coppock},
    year = {2026},
    note = {R package version 2.0.1},
    url = {https://declaredesign.org/r/randomizr/},
  }

  @Article{,
    title = {Declaring and Diagnosing Research Designs},
    author = {Graeme Blair and Jasper Cooper and Alexander Coppock and
      Macartan Humphreys},
    journal = {American Political Science Review},
    year = {2019},
    volume = {113},
    number = {3},
    pages = {838--859},
    doi = {10.1017/S0003055419000194},
  }