To cite iGC in publications use:

  Yi-Pin Lai, Liang-Bo Wang, Liang-Chuan Lai, Mong-Hsun Tsai, Tzu-Pin
  Lu, and Eric Y. Chuang (2015). iGC--an integrated analysis package of
  Gene expression and Copy number alteration. Manuscript submitted for
  publication.

A BibTeX entry for LaTeX users is

  @Unpublished{,
    title = {iGC--an integrated analysis package of Gene expression and Copy number alteration},
    author = {Yi-Pin Lai and Liang-Bo Wang and Tzu-Pin Lu and Liang-Chuan Lai and Mong-Hsun Tsai and Eric Y. Chuang},
    note = {Manuscript submitted for publication},
    year = {2015},
  }