To cite StateTrace in publications use:

Melissa Prince, Guy Hawkins, Jonathon Love, & Andrew Heathcote (2011). An R package for state-trace analysis. Manuscript submitted for publication.

Corresponding BibTeX entry:

  @Article{,
    title = {An R package for state-trace analysis},
    author = {Melissa Prince and Guy Hawkins and Jonathon Love and
      Andrew Heathcote},
    journal = {Manuscript submitted for publication},
    year = {2011},
  }