To cite package ‘BSgenome’ in publications use:

  Pagès H (2024). _BSgenome: Software infrastructure for efficient
  representation of full genomes and their SNPs_. R package version
  1.73.0, <https://bioconductor.org/packages/BSgenome>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {BSgenome: Software infrastructure for efficient representation of full
genomes and their SNPs},
    author = {Hervé Pagès},
    year = {2024},
    note = {R package version 1.73.0},
    url = {https://bioconductor.org/packages/BSgenome},
  }