@book{steiner-ga90c-de,
  author = {Steiner, Rudolf},
  title = {Theosophie und Okkultismus},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {90c},
  edition = {1},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {2021},
  pagetotal = {148},
  isbn = {978-3-7274-0907-3},
  language = {german},
}

@online{anthroposophyai-ga90c,
  author = {Steiner, Rudolf},
  title = {Theosophie und Okkultismus (GA 90c), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/90c/},
  urldate = {2026-10-20},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Theosophie und Okkultismus (GA 90c), as served by anthroposophy.ai, https://anthroposophy.ai/ga/90c/, register entry https://anthroposophy.ai/contents/90c/, status as of 2026-10-20: German served; English editions English.},
}