To cite the JASPAR package in publications use:

Zhao et al (2013), JASPAR 2013: An extensively expanded and updated open-access database of transcription factor binding profiles. (In preparation)

Corresponding BibTeX entry:

  @Article{,
    author = {Xiaobei Zhao and et al.},
    title = {JASPAR 2013: An extensively expanded and updated
      open-access database of transcription factor binding profiles},
    journal = {TBA},
    year = {2013},
    volume = {TBA},
    pages = {TBA},
    number = {TBA},
    url = {TBA},
  }