To cite cubfits in a publication use:

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

Chen, W.-C., Zaretzki, R., Howell, W., Schmidt, D., and Gilchrist, M. (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
      Drew Schmidt and Michael 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
      Drew Schmidt and Michael Gilchrist},
    year = {2014},
    note = {{R} Vignette, URL
      http://cran.r-project.org/package=cubfits},
  }