To cite package ‘ymq’ in publications use:

  Martin S (2024). _ymq: Year Months and Quarters_. R package version
  0.1.0, <https://github.com/marberts/yqm>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ymq: Year Months and Quarters},
    author = {Steve Martin},
    year = {2024},
    note = {R package version 0.1.0},
    url = {https://github.com/marberts/yqm},
  }