To cite package ‘zFPKM’ in publications use:

  Ammar R, Thompson J (2024). _zFPKM: A suite of functions to
  facilitate zFPKM transformations_. R package version 1.27.0,
  <https://bioconductor.org/packages/zFPKM>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {zFPKM: A suite of functions to facilitate zFPKM transformations},
    author = {Ron Ammar and John Thompson},
    year = {2024},
    note = {R package version 1.27.0},
    url = {https://bioconductor.org/packages/zFPKM},
  }