APA (7th ed.) Citation

Ullrich, H., Duke, J., & Balestrini, D. (2008). Rudolf Steiner. Continuum International Pub. Group.

Chicago Style (17th ed.) Citation

Ullrich, Heiner, Janet Duke, and Daniel Balestrini. Rudolf Steiner. New York, NY: Continuum International Pub. Group, 2008.

MLA (9th ed.) Citation

Ullrich, Heiner, et al. Rudolf Steiner. Continuum International Pub. Group, 2008.