Odell E (2018). fixerapi: An R Client for the "Fixer.io" Currency API. doi: 10.5281/zenodo.1211687, R package version 0.1.6.9000, https://docs.evanodell.com/fixerapi.

@Manual{,
  title = {{fixerapi}: An R Client for the "Fixer.io" Currency API},
  author = {Evan Odell},
  year = {2018},
  note = {R package version 0.1.6.9000},
  doi = {10.5281/zenodo.1211687},
  url = {https://docs.evanodell.com/fixerapi},
}