To cite package ‘spdl’ in publications use:

  Eddelbuettel D (2023). _spdl: Easier Use of 'RcppSpdlog' Functions
  via Wrapper_. R package version 0.0.5,
  <https://github.com/eddelbuettel/spdl>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {spdl: Easier Use of 'RcppSpdlog' Functions via Wrapper},
    author = {Dirk Eddelbuettel},
    year = {2023},
    note = {R package version 0.0.5},
    url = {https://github.com/eddelbuettel/spdl},
  }