To cite package 'PCIT' in publications use:

Nathan S. Watson-Haigh, Haja N. Kadarmideen, and Antonio Reverter (2010). PCIT: an R package for weighted gene co-expression networks based on partial correlation and information theory approaches. Bioinformatics. 26(3) 411-413.

Corresponding BibTeX entry:

  @Article{,
    title = {{PCIT}: an R package for weighted gene co-expression
      networks based on partial correlation and information theory
      approaches},
    abstract = {Summary: We make the {PCIT} algorithm, used for
      detecting meaningful gene-gene associations in co-expression
      networks, available as an R package. Automatic detection of a
      suitable parallel environment is used such that scripts are
      portable between parallel and non-parallel environments with no
      modification of the script. Availability and implementation:
      Source code and binaries freely available (under {GPL}-3) for
      download via {CRAN} at {http://cran.r-project.org/package=PCIT},
      implemented in R and supported on Linux and {MS} Windows.
      Contact: nathan.watson-haigh@csiro.au},
    author = {Nathan S. {Watson-Haigh} and Haja N. {Kadarmideen} and
      Antonio {Reverter}},
    journal = {Bioinformatics},
    year = {2010},
    month = {feb},
    volume = {26},
    number = {3},
    pages = {411-413},
    url =
      {http://bioinformatics.oxfordjournals.org/cgi/content/abstract/26/3/411},
    doi = {10.1093/bioinformatics/btp674},
    note = {R package version 1.5-3},
  }