To cite jagstargets in publications use:

  Landau, W. M., (2021). The jagstargets R package: a reproducible
  workflow framework for Bayesian data analysis with JAGS. Journal of
  Open Source Software, 6(68), 3877,
  https://doi.org/10.21105/joss.03877

A BibTeX entry for LaTeX users is

  @Article{,
    title = {The jagstargets R package: a reproducible workflow framework for Bayesian data analysis with JAGS},
    author = {William Michael Landau},
    journal = {Journal of Open Source Software},
    year = {2021},
    volume = {6},
    number = {68},
    pages = {3877},
    url = {https://doi.org/10.21105/joss.03877},
  }