To cite shinystan in publications use:

Stan Development Team (2017). shinystan: Interactive Visual and Numerical Diagnostics and Posterior Analysis for {Bayesian} Models. R package version 2.3.0. http://mc-stan.org/.

Corresponding BibTeX entry:

  @Misc{,
    title = {shinystan: Interactive Visual and Numerical Diagnostics
      and Posterior Analysis for Bayesian Models.},
    author = {{Stan Development Team}},
    year = {2017},
    note = {R package version 2.3.0},
    url = {http://mc-stan.org/},
  }