To cite ggmcmc in publications use:

Xavier Fernández i Marín (????). “ggmcmc: Graphical tools for analyzing Markov Chain Monte Carlo simulations from Bayesian inference.” http://xavier-fim.net/packages/ggmcmc.

Corresponding BibTeX entry:

  @Misc{,
    title = {{ggmcmc}: Graphical tools for analyzing Markov Chain Monte
      Carlo simulations from Bayesian inference},
    author = {{Xavier Fernández i Marín}},
    url = {http://xavier-fim.net/packages/ggmcmc},
  }