@book{steiner-ga68b-de,
  author = {Steiner, Rudolf},
  title = {Der Kreislauf des Menschen innerhalb der Sinnes-, Seelen- und Geisteswelt},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {68b},
  edition = {1},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {2021},
  pagetotal = {928},
  isbn = {978-3-7274-0681-2},
  language = {german},
}

@online{anthroposophyai-ga68b,
  author = {Steiner, Rudolf},
  title = {Der Kreislauf des Menschen innerhalb der Sinnes-, Seelen- und Geisteswelt (GA 68b), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/68b/},
  urldate = {2026-10-20},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Der Kreislauf des Menschen innerhalb der Sinnes-, Seelen- und Geisteswelt (GA 68b), as served by anthroposophy.ai, https://anthroposophy.ai/ga/68b/, register entry https://anthroposophy.ai/contents/68b/, status as of 2026-10-20: German served; English editions English.},
}