@book{steiner-ga57-de,
  author = {Steiner, Rudolf},
  title = {Wo und wie findet man den Geist? (1908/09)},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {57},
  edition = {2},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {1984},
  pagetotal = {482},
  isbn = {978-3-7274-0570-9},
  language = {german},
}

@book{steiner-ga57-en-tp1980,
  author = {Steiner, Rudolf},
  title = {Goethe's Secret Revelation},
  year = {1980},
  language = {english},
  note = {GA 57; edition code TP1980},
}

@online{anthroposophyai-ga57,
  author = {Steiner, Rudolf},
  title = {Wo und wie findet man den Geist? (1908/09) (GA 57), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/57/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Wo und wie findet man den Geist? (1908/09) (GA 57), as served by anthroposophy.ai, https://anthroposophy.ai/ga/57/, register entry https://anthroposophy.ai/contents/57/, status as of 2026-10-21: German served; English editions TP1980.},
}