To cite lunar in publications use:

Lazaridis, E. (2014). lunar: Lunar Phase & Distance, Seasons and Other Environmental Factors (Version 0.1-04). Available from http://statistics.lazaridis.eu

Corresponding BibTeX entry:

  @Manual{,
    title = {lunar: Lunar Phase & Distance, Seasons and Other
      Environmental Factors},
    author = {Emmanuel Lazaridis},
    year = {2014},
    note = {(Version 0.1-04)},
    url = {http://statistics.lazaridis.eu},
  }