To cite cubfits in a publication use:

Chen W, Zaretzki R, Howell W, Landerer C, Schmidt D, Gilchrist MA (2014). “cubfits: Codon Usage Bias Fits.” R Package, URL http://cran.r-project.org/package=cubfits.

Chen W, Zaretzki R, Howell W, Landerer C, Schmidt D, Gilchrist MA (2014). A Quick Guide for the cubfits Package. R Vignette, URL http://cran.r-project.org/package=cubfits.

Corresponding BibTeX entries:

  @Misc{Chen2014cubfitspackage,
    title = {{cubfits}: Codon Usage Bias Fits},
    author = {Wei-Chen Chen and Russell Zaretzki and William Howell and
      Cedric Landerer and Drew Schmidt and Michael A. Gilchrist},
    year = {2014},
    note = {{R} Package, URL
      http://cran.r-project.org/package=cubfits},
  }

  @Manual{Chen2014cubfitsvignette,
    title = {A Quick Guide for the {cubfits} Package},
    author = {Wei-Chen Chen and Russell Zaretzki and William Howell and
      Cedric Landerer and Drew Schmidt and Michael A. Gilchrist},
    year = {2014},
    note = {{R} Vignette, URL
      http://cran.r-project.org/package=cubfits},
  }