To cite package ‘CMIP5files’ in publications use:

Sumner M (2016). CMIP5files: What the Package Does (one line, title case). R package version 0.0.0.9000, https://github.com/hypertidy/cmip5files.

Corresponding BibTeX entry:

  @Manual{,
    title = {CMIP5files: What the Package Does (one line, title case)},
    author = {Michael D. Sumner},
    year = {2016},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/hypertidy/cmip5files},
  }