To cite package ‘aroma.apd’ in publications use:

  Bengtsson H (2024). _aroma.apd: A Probe-Level Data File Format Used
  by 'aroma.affymetrix' [deprecated]_. R package version 0.7.0, ,
  <https://github.com/henrikbengtsson/aroma.apd>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {aroma.apd: A Probe-Level Data File Format Used by 'aroma.affymetrix'
[deprecated]},
    author = {Henrik Bengtsson},
    year = {2024},
    note = {R package version 0.7.0, 
},
    url = {https://github.com/henrikbengtsson/aroma.apd},
  }