To cite package ‘observationalBlocks’ in publications use:

  Brumberg K, Rosenbaum P (2026). _observationalBlocks: Block Designs
  for Observational Studies_. R package version 1.0.0,
  <https://github.com/kkbrum/observationalblocks>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {observationalBlocks: Block Designs for Observational Studies},
    author = {Katherine Brumberg and Paul Rosenbaum},
    year = {2026},
    note = {R package version 1.0.0},
    url = {https://github.com/kkbrum/observationalblocks},
  }