To cite package ‘preferably’ in publications use:

  Abdol A (2022). _preferably: A 'pkgdown' Template_. R package version
  0.4.1, <https://github.com/amirmasoudabdol/preferably>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {preferably: A 'pkgdown' Template},
    author = {Amir Masoud Abdol},
    year = {2022},
    note = {R package version 0.4.1},
    url = {https://github.com/amirmasoudabdol/preferably},
  }