To cite package ‘openmpt’ in publications use:

  de Vries P (2024). _openmpt: Open ModPlug Tracker port_. R package
  version 0.0.1.0004, , <https://github.com/pepijn-devries/openmpt>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {openmpt: Open ModPlug Tracker port},
    author = {Pepijn {de Vries}},
    year = {2024},
    note = {R package version 0.0.1.0004, 
},
    url = {https://github.com/pepijn-devries/openmpt},
  }