To cite the 'abc' package in publications use:

Csillery K, Francois O, Blum M (2012). “abc: an R package for approximate Bayesian computation (ABC).” Methods in Ecology and Evolution. doi:10.1111/j.2041-210X.2011.00179.x.

Corresponding BibTeX entry:

  @Article{,
    title = {abc: an R package for approximate Bayesian computation
      (ABC)},
    author = {Katalin Csillery and Olivier Francois and Michael G. B.
      Blum},
    year = {2012},
    journal = {Methods in Ecology and Evolution},
    doi = {10.1111/j.2041-210X.2011.00179.x},
  }