To cite mice in publications use:

Stef van Buuren, Karin Groothuis-Oudshoorn (2011). mice: Multivariate Imputation by Chained Equations in R. Journal of Statistical Software, 45(3), 1-67. URL http://www.jstatsoft.org/v45/i03/.

Corresponding BibTeX entry:

  @Article{,
    title = {{mice}: Multivariate Imputation by Chained Equations in
      R},
    author = {Stef {van Buuren} and Karin Groothuis-Oudshoorn},
    journal = {Journal of Statistical Software},
    year = {2011},
    volume = {45},
    number = {3},
    pages = {1--67},
    url = {http://www.jstatsoft.org/v45/i03/},
  }