When using RWeka in publications, please cite both the RWeka interface
and Weka itself:

To cite RWeka, the R interface to Weka, please use:

  Hornik K, Buchta C, Zeileis A (2009). “Open-Source Machine Learning:
  R Meets Weka.” _Computational Statistics_, *24*(2), 225-232.
  doi:10.1007/s00180-008-0119-7
  <https://doi.org/10.1007/s00180-008-0119-7>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Open-Source Machine Learning: {R} Meets {Weka}},
    author = {Kurt Hornik and Christian Buchta and Achim Zeileis},
    journal = {Computational Statistics},
    year = {2009},
    volume = {24},
    number = {2},
    pages = {225--232},
    doi = {10.1007/s00180-008-0119-7},
  }

To cite Weka, please use:

  Witten IH, Frank E (2005). _Data Mining: Practical Machine Learning
  Tools and Techniques_, 2nd edition. Morgan Kaufmann, San Francisco.

A BibTeX entry for LaTeX users is

  @Book{,
    title = {Data Mining: Practical Machine Learning Tools and Techniques},
    author = {Ian H. Witten and Eibe Frank},
    year = {2005},
    edition = {2nd},
    publisher = {Morgan Kaufmann},
    address = {San Francisco},
  }