To cite package 'curatedBreastData' in publications use:

  Planey KR, Butte AJ. Database integration of 4923 publicly-available
  samples of breast cancer molecular and clinical data. AMIA Joint
  Summits Translational Science Proceedings. 2013;2013:237-241. PMCID:
  PMC3814460

A BibTeX entry for LaTeX users is

  @InProceedings{,
    title = {Database integration of 4923 publicly-available samples of breast cancer molecular and clinical data},
    author = {Katie R. Planey and Atul J. Butte},
    booktitle = {AMIA Joint Summits on Translational Science Proceedings},
    year = {2013},
    pages = {237--241},
    note = {PMCID: PMC3814460},
    doi = {10.18129/B9.bioc.curatedBreastData},
  }