@book{steiner-ga90b-de,
  author = {Steiner, Rudolf},
  title = {Selbsterkenntnis und Gotteserkenntnis II},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {90b},
  edition = {1},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {2018},
  pagetotal = {450},
  isbn = {978-3-7274-0905-9},
  language = {german},
}

@online{anthroposophyai-ga90b,
  author = {Steiner, Rudolf},
  title = {Selbsterkenntnis und Gotteserkenntnis II (GA 90b), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/90b/},
  urldate = {2026-10-20},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Selbsterkenntnis und Gotteserkenntnis II (GA 90b), as served by anthroposophy.ai, https://anthroposophy.ai/ga/90b/, register entry https://anthroposophy.ai/contents/90b/, status as of 2026-10-20: German served; English editions English.},
}