To cite package ‘R2OpenBUGS’ in publications use:

  Sturtz, S., Ligges, U., and Gelman, A. (2005). R2WinBUGS: A Package
  for Running WinBUGS from R. Journal of Statistical Software, 12(3),
  1-16.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {R2WinBUGS: A Package for Running WinBUGS from R},
    author = {Sibylle Sturtz and Uwe Ligges and Andrew Gelman},
    journal = {Journal of Statistical Software},
    year = {2005},
    pages = {1--16},
    number = {3},
    volume = {12},
    doi = {10.18637/jss.v012.i03},
  }