To cite package 'diezeit' in publications use:

Graul, Christian (2015): diezeit: R Interface to the ZEIT ONLINE Content API. R package, https://cran.r-project.org/package=diezeit.

Please cite both 'diezeit' and R when using 'diezeit'. For R citation, see ‘citation()’

Corresponding BibTeX entry:

  @Manual{,
    title = {diezeit: R Interface to the ZEIT ONLINE Content API},
    author = {Christian Graul},
    year = {2015},
    url = {https://cran.r-project.org/package=diezeit},
    note = {R package},
  }