@book{steiner-ga384-de,
  author = {Steiner, Rudolf},
  title = {Sämtliche Briefe. Band 4: Wirken innerhalb der Theosophischen Gesellschaft 18. Januar 1905 – 14. Dezember 1912},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {38/4},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  isbn = {978-3-7274-0384-2},
  language = {german},
}

@online{anthroposophyai-ga384,
  author = {Steiner, Rudolf},
  title = {Sämtliche Briefe. Band 4: Wirken innerhalb der Theosophischen Gesellschaft 18. Januar 1905 – 14. Dezember 1912 (GA 38/4), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/38-4/},
  urldate = {2026-10-20},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Sämtliche Briefe. Band 4: Wirken innerhalb der Theosophischen Gesellschaft 18. Januar 1905 – 14. Dezember 1912 (GA 38/4), as served by anthroposophy.ai, https://anthroposophy.ai/ga/38-4/, register entry https://anthroposophy.ai/contents/38-4/, status as of 2026-10-20: German via earlier edition.},
}