To cite package ‘flextable’ in publications use:

  Gohel D, Skintzos P (2024). _flextable: Functions for Tabular
  Reporting_. R package version 0.9.7, ,
  <https://github.com/davidgohel/flextable>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {flextable: Functions for Tabular Reporting},
    author = {David Gohel and Panagiotis Skintzos},
    year = {2024},
    note = {R package version 0.9.7, 
},
    url = {https://github.com/davidgohel/flextable},
  }