Please cite rbioapi as

  Moosa Rezwani, Ali Akbar Pourfathollah, Farshid Noorbakhsh, rbioapi:
  user-friendly R interface to biologic web services’ API,
  Bioinformatics, Volume 38, Issue 10, 15 May 2022, Pages 2952–2953,
  https://doi.org/10.1093/bioinformatics/btac172

A BibTeX entry for LaTeX users is

  @Article{,
    title = {rbioapi: User-Friendly R Interface to Biologic Web Services' API},
    author = {Moosa Rezwani and Ali Akbar Pourfathollah and Farshid Noorbakhsh},
    journal = {Bioinformatics},
    volume = {38},
    number = {10},
    pages = {2952-2953},
    year = {2022},
    month = {03},
    issn = {1367-4803},
    doi = {10.1093/bioinformatics/btac172},
  }

Important Note: rbioapi is an interface to web services API; please
make sure to fully and properly cite the databases/services you have
used. Suggested citations have been added to each function manual and
the vignette articles. Nevertheless, it is the user's responsibility to
fully and properly cite the services they have used.