APA (7th ed.) Zitazioa
Steiner, R. The Evolution of the World and of Humanity: 13 Lectures Given at Penmaenmawr, August, 1923.
Chicago Style (17th ed.) Zitazioa
Steiner, Rudolf. The Evolution of the World and of Humanity: 13 Lectures Given at Penmaenmawr, August, 1923.
MLA (9th ed.) Zitazioa
Steiner, Rudolf. The Evolution of the World and of Humanity: 13 Lectures Given at Penmaenmawr, August, 1923.
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