@book{steiner-ga54-de,
  author = {Steiner, Rudolf},
  title = {Die Welträtsel und die Anthroposophie (1905/06)},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {54},
  edition = {2},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {1983},
  pagetotal = {550},
  isbn = {978-3-7274-0540-2},
  language = {german},
}

@online{anthroposophyai-ga54,
  author = {Steiner, Rudolf},
  title = {Die Welträtsel und die Anthroposophie (1905/06) (GA 54), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/54/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Die Welträtsel und die Anthroposophie (1905/06) (GA 54), as served by anthroposophy.ai, https://anthroposophy.ai/ga/54/, register entry https://anthroposophy.ai/contents/54/, status as of 2026-10-21: German served; English editions English.},
}