To cite package ‘convertr’ in publications use:

Shotwell G (2018). convertr: Convert Between Units. R package version 0.1, https://github.com/gshotwell/convertr.

Corresponding BibTeX entry:

  @Manual{,
    title = {convertr: Convert Between Units},
    author = {Gordon Shotwell},
    year = {2018},
    note = {R package version 0.1},
    url = {https://github.com/gshotwell/convertr},
  }