To cite package ‘SBC’ in publications use:

  Modrák, M., Moon, A. H., Kim, S., Bürkner, P., Huurre, N.,
  Faltejsková, K., Gelman, A., & Vehtari, A. (2023). Simulation-based
  calibration checking for Bayesian computation: The choice of test
  quantities shapes sensitivity. Bayesian Analysis, Advance
  publication.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Simulation-based calibration checking for Bayesian computation: The choice of test quantities shapes sensitivity},
    author = {Martin Modrák and Angie H. Moon and Shinyoung Kim and Paul Bürkner and Niko Huurre and Kateřina Faltejsková and Andrew Gelman and Aki Vehtari},
    year = {2023},
    journal = {Bayesian Analysis},
    volume = {Advance publication},
    doi = {10.1214/23-BA1404},
  }