To cite ParallelPC in publications use:

Thuc Duy Le, Tao Hoang, Jiuyong Li, Lin Liu, Shu Hu (2015). ParallelPC: an R package for efficient constraint based causal exploration. arXiv preprint arXiv:1510.03042. http://arxiv.org/pdf/1510.03042.pdf.

Corresponding BibTeX entry:

  @Article{,
    title = {ParallelPC: an R package for efficient constraint based
      causal exploration},
    author = {Thuc Duy Le and Tao Hoang and Jiuyong Li and Lin Liu and
      Shu Hu},
    journal = {rXiv preprint arXiv},
    year = {2015},
    volume = {1510},
    number = {03042},
    url = {http://arxiv.org/pdf/1510.03042.pdf},
  }