@book{steiner-ga2661-de,
  author = {Steiner, Rudolf},
  title = {Aus den Inhalten der esoterischen Stunden, Band I: 1904 – 1909},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {266/1},
  edition = {3},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {2024},
  pagetotal = {626},
  isbn = {978-3-7274-2661-2},
  language = {german},
}

@online{anthroposophyai-ga2661,
  author = {Steiner, Rudolf},
  title = {Aus den Inhalten der esoterischen Stunden, Band I: 1904 – 1909 (GA 266/1), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/266-1/},
  urldate = {2026-10-20},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Aus den Inhalten der esoterischen Stunden, Band I: 1904 – 1909 (GA 266/1), as served by anthroposophy.ai, https://anthroposophy.ai/ga/266a/, register entry https://anthroposophy.ai/contents/266-1/, status as of 2026-10-20: German served; English editions English.},
}