To cite CARBayes in publications use:

Lee D (2013). “CARBayes: An R Package for Bayesian Spatial Modeling with Conditional Autoregressive Priors.” Journal of Statistical Software, 55(13), 1–24. http://www.jstatsoft.org/v55/i13/.

Corresponding BibTeX entry:

  @Article{,
    title = {{CARBayes}: An {R} Package for {B}ayesian Spatial Modeling
      with Conditional Autoregressive Priors},
    author = {Duncan Lee},
    journal = {Journal of Statistical Software},
    year = {2013},
    volume = {55},
    number = {13},
    pages = {1--24},
    url = {http://www.jstatsoft.org/v55/i13/},
  }