To cite package ‘aLFQ’ in publications use:

  Rosenberger G, Ludwig C, Roest HL, Aebersold R, Malmstroem L. aLFQ:
  an R-package for estimating absolute protein quantities from
  label-free LC-MS/MS proteomics data. Bioinformatics. 2014 Sep
  1;30(17):2511-3. doi: 10.1093/bioinformatics/btu200. Epub 2014 Apr
  20.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {aLFQ: an R-package for estimating absolute protein quantities from label-free LC-MS/MS proteomics data},
    author = {George Rosenberger and Christina Ludwig and Hannes L. Roest and Ruedi Aebersold and Lars Malmstroem},
    journal = {Bioinformatics},
    year = {2014},
    volume = {30},
    number = {17},
    pages = {2511-2513},
    doi = {10.1093/bioinformatics/btu200},
    url = {https://academic.oup.com/bioinformatics/article/30/17/2511/2748144},
  }