To cite DMwR in publications use:

Torgo, L. (2010). Data Mining with R, learning with case studies Chapman and Hall/CRC. URL: http://www.dcc.fc.up.pt/~ltorgo/DataMiningWithR

Corresponding BibTeX entry:

  @Book{,
    title = {Data Mining with R, learning with case studies},
    author = {L. Torgo},
    publisher = {Chapman and Hall/CRC},
    year = {2010},
    url = {http://www.dcc.fc.up.pt/~ltorgo/DataMiningWithR},
  }