APA (7th ed.) Citation

Petersen, K. (1968). Rudolf Steiner. Colloquium-Verl.

Chicago Style (17th ed.) Citation

Petersen, Klaus. Rudolf Steiner. Berlin: Colloquium-Verl, 1968.

MLA (9th ed.) Citation

Petersen, Klaus. Rudolf Steiner. Colloquium-Verl, 1968.

Warning: These citations may not always be 100% accurate.