@book{steiner-ga31-de,
  author = {Steiner, Rudolf},
  title = {Gesammelte Aufsätze zur Kultur- und Zeitgeschichte 1887 – 1901},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {31},
  edition = {3},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {1989},
  pagetotal = {730},
  isbn = {978-3-7274-0310-1},
  language = {german},
}

@online{anthroposophyai-ga31,
  author = {Steiner, Rudolf},
  title = {Gesammelte Aufsätze zur Kultur- und Zeitgeschichte 1887 – 1901 (GA 31), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/31/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Gesammelte Aufsätze zur Kultur- und Zeitgeschichte 1887 – 1901 (GA 31), as served by anthroposophy.ai, https://anthroposophy.ai/ga/31/, register entry https://anthroposophy.ai/contents/31/, status as of 2026-10-21: German served; English editions English.},
}