To cite ggmcmc in publications use:

Fernández-i-Mar\'in X (2016). “ggmcmc: Analysis of MCMC Samples and Bayesian Inference.” Journal of Statistical Software, 70(9), 1–20. doi:10.18637/jss.v070.i09.

Corresponding BibTeX entry:

  @Article{,
    title = {{ggmcmc}: Analysis of {MCMC} Samples and {B}ayesian
      Inference},
    author = {Xavier Fern{\'a}ndez-i-Mar{\'i}n},
    journal = {Journal of Statistical Software},
    year = {2016},
    volume = {70},
    number = {9},
    pages = {1--20},
    doi = {10.18637/jss.v070.i09},
  }