To cite package coda in publications use:

Plummer M, Best N, Cowles K, Vines K (2006). “CODA: Convergence Diagnosis and Output Analysis for MCMC.” R News, 6(1), 7–11. https://journal.r-project.org/archive/.

Corresponding BibTeX entry:

  @Article{,
    title = {CODA: Convergence Diagnosis and Output Analysis for MCMC},
    author = {Martyn Plummer and Nicky Best and Kate Cowles and Karen
      Vines},
    journal = {R News},
    year = {2006},
    volume = {6},
    number = {1},
    pages = {7--11},
    url = {https://journal.r-project.org/archive/},
    pdf = {https://www.r-project.org/doc/Rnews/Rnews_2006-1.pdf},
  }