@book{steiner-ga56-de,
  author = {Steiner, Rudolf},
  title = {Die Erkenntnis der Seele und des Geistes (1907/08)},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {56},
  edition = {2},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {1985},
  pagetotal = {382},
  isbn = {978-3-7274-0560-0},
  language = {german},
}

@book{steiner-ga56-en-ap1969,
  author = {Steiner, Rudolf},
  title = {Illusory Illness and the Feverish Pursuit of Health},
  translator = {Sarah Kurland},
  publisher = {Anthroposophic Press},
  year = {1969},
  language = {english},
  note = {GA 56; edition code AP1969},
}

@online{anthroposophyai-ga56,
  author = {Steiner, Rudolf},
  title = {Die Erkenntnis der Seele und des Geistes (1907/08) (GA 56), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/56/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Die Erkenntnis der Seele und des Geistes (1907/08) (GA 56), as served by anthroposophy.ai, https://anthroposophy.ai/ga/56/, register entry https://anthroposophy.ai/contents/56/, status as of 2026-10-21: German served; English editions AP1969.},
}