@book{steiner-ga197-de,
  author = {Steiner, Rudolf},
  title = {Gegensätze in der Menschheitsentwickelung},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {197},
  edition = {3},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {1996},
  pagetotal = {232},
  isbn = {978-3-7274-1970-6},
  language = {german},
}

@book{steiner-ga197-en-rsp1987,
  author = {Steiner, Rudolf},
  title = {Polarities in the Evolution of Mankind},
  publisher = {Rudolf Steiner Press},
  year = {1987},
  language = {english},
  note = {GA 197; edition code RSP1987},
}

@online{anthroposophyai-ga197,
  author = {Steiner, Rudolf},
  title = {Gegensätze in der Menschheitsentwickelung (GA 197), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/197/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Gegensätze in der Menschheitsentwickelung (GA 197), as served by anthroposophy.ai, https://anthroposophy.ai/ga/197/, register entry https://anthroposophy.ai/contents/197/, status as of 2026-10-21: German served; English editions RSP1987.},
}