To cite {mctq} in publications use:

  Vartanian, D. (2024). {mctq}: Munich ChronoType Questionnaire tools
  (Version 0.3.2.9001) [Computer software - R package]. CRAN; rOpenSci.
  https://doi.org/10.32614/CRAN.package.mctq

A BibTeX entry for LaTeX users is

  @Misc{,
    title = {{mctq}: Munich ChronoType Questionnaire tools},
    author = {Daniel Vartanian},
    year = {2024},
    publisher = {CRAN; rOpenSci},
    doi = {10.32614/CRAN.package.mctq},
    note = {R package version 0.3.2.9001},
  }