To cite package ‘gmt’ in publications use:

Magnusson A (2023). gmt: Interface Between GMT Map-Making Software and R. R package version 2.0.3, https://github.com/arni-magnusson/gmt.

Corresponding BibTeX entry:

  @Manual{,
    title = {gmt: Interface Between GMT Map-Making Software and R},
    author = {Arni Magnusson},
    year = {2023},
    note = {R package version 2.0.3},
    url = {https://github.com/arni-magnusson/gmt},
  }