Cita APA

Steiner, R. 1., & Steiner, R. 1. (1963). The Philosophy of spiritual activity: Fundamentals of a modern view of the world. New York, New York: R. Steiner.

Citación estilo Chicago

Steiner, Rudolf 1861-1925, y Rudolf 1861-1925 Steiner. The Philosophy of Spiritual Activity: Fundamentals of a Modern View of the World. New York, New York: R. Steiner, 1963.

Cita MLA

Steiner, Rudolf 1861-1925, y Rudolf 1861-1925 Steiner. The Philosophy of Spiritual Activity: Fundamentals of a Modern View of the World. New York, New York: R. Steiner, 1963.