@book{steiner-ga284-de,
  author = {Steiner, Rudolf},
  title = {Bilder okkulter Siegel und Säulen},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {284},
  edition = {3},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {1992},
  pagetotal = {267},
  isbn = {978-3-7274-2849-4},
  language = {german},
}

@book{steiner-ga284-en-sol2024,
  author = {Steiner, Rudolf},
  title = {Images of Occult Seals and Columns},
  publisher = {Steiner Online Library},
  year = {2024},
  language = {english},
  note = {GA 284; edition code SOL2024},
}

@online{anthroposophyai-ga284,
  author = {Steiner, Rudolf},
  title = {Bilder okkulter Siegel und Säulen (GA 284), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/284/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Bilder okkulter Siegel und Säulen (GA 284), as served by anthroposophy.ai, https://anthroposophy.ai/ga/284/, register entry https://anthroposophy.ai/contents/284/, status as of 2026-10-21: German served; English editions SOL2024.},
}