@book{steiner-ga4-de,
  author = {Steiner, Rudolf},
  title = {Die Philosophie der Freiheit (1894)},
  series = {Rudolf Steiner Gesamtausgabe},
  number = {4},
  edition = {17},
  publisher = {Rudolf Steiner Verlag},
  address = {Basel},
  year = {2021},
  pagetotal = {292},
  isbn = {3-7274-0040-4},
  language = {german},
}

@book{steiner-ga4-en-ap1986,
  author = {Steiner, Rudolf},
  title = {The Philosophy of Spiritual Activity. The Basic Features of a Modern World View. Results of Soul Observation Arrived at by the Scientific Method},
  translator = {William Lindeman},
  publisher = {Anthroposophic Press},
  address = {New York},
  year = {1986},
  isbn = {0-88010-156-3},
  language = {english},
  note = {GA 4; edition code AP1986},
}

@book{steiner-ga4-en-gpp1916,
  author = {Steiner, Rudolf},
  title = {The Philosophy of Freedom},
  translator = {Prof. and Mrs. R. F. Alfred Hoernlé},
  publisher = {G. P. Putnam's Sons},
  address = {New York and London},
  year = {1894},
  language = {english},
  note = {GA 4; edition code GPP1916},
}

@book{steiner-ga4-en-rsp1964,
  author = {Steiner, Rudolf},
  title = {The Philosophy of Freedom. The Basis for a Modern World Conception},
  translator = {Michael Wilson},
  publisher = {Rudolf Steiner Press},
  address = {London},
  year = {1964},
  pagetotal = {230},
  language = {english},
  note = {GA 4; edition code RSP1964},
}

@book{steiner-ga4-en-rspc1949,
  author = {Steiner, Rudolf},
  title = {The Philosophy of Spiritual Activity},
  translator = {Prof. and Mrs. R. F. Alfred Hoernlé},
  publisher = {Rudolf Steiner Publications},
  address = {London},
  year = {1949},
  pagetotal = {220},
  language = {english},
  note = {GA 4; edition code RSPC1949},
}

@book{steiner-ga4-en-rspi1963,
  author = {Steiner, Rudolf},
  title = {The Philosophy of Spiritual Activity},
  translator = {Rita Stebbing},
  publisher = {Rudolf Steiner Publications, Inc.},
  address = {New York},
  year = {1963},
  pagetotal = {411},
  language = {english},
  note = {GA 4; edition code RSPI1963},
}

@online{anthroposophyai-ga4,
  author = {Steiner, Rudolf},
  title = {Die Philosophie der Freiheit (1894) (GA 4), as served by anthroposophy.ai},
  url = {https://anthroposophy.ai/contents/4/},
  urldate = {2026-10-21},
  organization = {anthroposophy.ai},
  note = {Rudolf Steiner, Die Philosophie der Freiheit (1894) (GA 4), as served by anthroposophy.ai, https://anthroposophy.ai/ga/4/, register entry https://anthroposophy.ai/contents/4/, status as of 2026-10-21: German served; English editions AP1986, GPP1916, RSP1964, RSPC1949, RSPI1963.},
}