To cite boa in publications use:

Smith BJ (2007). “boa: An R package for MCMC output convergence assessment and posterior inference.” Journal of Statistical Software, 21(11), 1–37. doi:10.18637/jss.v021.i11. https://www.jstatsoft.org/v21/i11.

Corresponding BibTeX entry:

  @Article{,
    title = {{boa}: An {R} package for {MCMC} output convergence
      assessment and posterior inference},
    author = {Brian J Smith},
    year = {2007},
    journal = {Journal of Statistical Software},
    volume = {21},
    number = {11},
    pages = {1--37},
    doi = {10.18637/jss.v021.i11},
    url = {https://www.jstatsoft.org/v21/i11},
  }