To cite package ‘NightDay’ in publications use:

  Hughes-Brandl M (2018). _NightDay: Night and Day Boundary Plot
  Function_. R package version 1.0.1.1,
  <https://CRAN.R-project.org/package=NightDay>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {NightDay: Night and Day Boundary Plot Function},
    author = {Max Hughes-Brandl},
    year = {2018},
    note = {R package version 1.0.1.1},
    url = {https://CRAN.R-project.org/package=NightDay},
  }

ATTENTION: This citation information has been auto-generated from the
package DESCRIPTION file and may need manual editing, see
‘help("citation")’.