To cite VIM in publications use:

Kowarik A, Templ M (2016). “Imputation with the R Package VIM.” Journal of Statistical Software, 74(7), 1–16. doi: 10.18637/jss.v074.i07.

Corresponding BibTeX entry:

  @Article{,
    title = {Imputation with the {R} Package {VIM}},
    author = {Alexander Kowarik and Matthias Templ},
    journal = {Journal of Statistical Software},
    year = {2016},
    volume = {74},
    number = {7},
    pages = {1--16},
    doi = {10.18637/jss.v074.i07},
  }