To cite package ‘fedup’ in publications use:

  Ross C (2021). _fedup: Fisher's Test for Enrichment and Depletion of
  User-Defined Pathways_. R package version 1.13.0,
  <https://bioconductor.org/packages/fedup>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fedup: Fisher's Test for Enrichment and Depletion of User-Defined
Pathways},
    author = {Catherine Ross},
    year = {2021},
    note = {R package version 1.13.0},
    url = {https://bioconductor.org/packages/fedup},
  }