To cite package ‘mailmerge’ in publications use:

de Vries A (2024). mailmerge: Mail Merge Using R Markdown Documents and 'gmailr'. R package version 0.2.5, https://github.com/andrie/mailmerge.

Corresponding BibTeX entry:

  @Manual{,
    title = {mailmerge: Mail Merge Using R Markdown Documents and
      'gmailr'},
    author = {Andrie {de Vries}},
    year = {2024},
    note = {R package version 0.2.5},
    url = {https://github.com/andrie/mailmerge},
  }