To cite package ‘a4Reporting’ in publications use:

  Verbeke T (2020). _a4Reporting: Automated Affymetrix Array Analysis
  Reporting Package_. R package version 1.53.0,
  <https://bioconductor.org/packages/a4Reporting>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {a4Reporting: Automated Affymetrix Array Analysis Reporting Package},
    author = {Tobias Verbeke},
    year = {2020},
    note = {R package version 1.53.0},
    url = {https://bioconductor.org/packages/a4Reporting},
  }