@book{steiner-ga251-de,
  author = {Steiner, Rudolf},
  title = {Zur Geschichte der Anthroposophischen Gesellschaft 1913–1922},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {251},
  edition = {1},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {2023},
  pagetotal = {956},
  isbn = {978-3-7274-2510-3},
  language = {german},
}

@online{anthroposophyai-ga251,
  author = {Steiner, Rudolf},
  title = {Zur Geschichte der Anthroposophischen Gesellschaft 1913–1922 (GA 251), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/251/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Zur Geschichte der Anthroposophischen Gesellschaft 1913–1922 (GA 251), as served by anthroposophy.ai, https://anthroposophy.ai/ga/251/, register entry https://anthroposophy.ai/contents/251/, status as of 2026-10-21: German served; English editions English.},
}