To cite package ‘rNOMADS’ in publications use:

  Bowman D (2014). _rNOMADS: An interface to the NOAA Operational Model
  Archive and Distribution System_. R package version 2.0.2,
  <https://r-forge.r-project.org/projects/rnomads>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rNOMADS: An interface to the NOAA Operational Model Archive and
Distribution System},
    author = {Daniel C. Bowman},
    year = {2014},
    note = {R package version 2.0.2},
    url = {https://r-forge.r-project.org/projects/rnomads},
  }