@book{steiner-ga138-de,
  author = {Steiner, Rudolf},
  title = {Von der Initiation. Von Ewigkeit und Augenblick. Von Geisteslicht und Lebensdunkel},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {138},
  edition = {4},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {1986},
  pagetotal = {176},
  isbn = {978-3-7274-1380-3},
  language = {german},
}

@book{steiner-ga138-en-ap1980,
  author = {Steiner, Rudolf},
  title = {Initiation, Eternity and the Passing Moment},
  publisher = {Anthroposophic Press},
  year = {1980},
  language = {english},
  note = {GA 138; edition code AP1980},
}

@online{anthroposophyai-ga138,
  author = {Steiner, Rudolf},
  title = {Von der Initiation. Von Ewigkeit und Augenblick. Von Geisteslicht und Lebensdunkel (GA 138), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/138/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Von der Initiation. Von Ewigkeit und Augenblick. Von Geisteslicht und Lebensdunkel (GA 138), as served by anthroposophy.ai, https://anthroposophy.ai/ga/138/, register entry https://anthroposophy.ai/contents/138/, status as of 2026-10-21: German served; English editions AP1980.},
}