APA (7th ed.) Citation

Steiner, R., & Barton, M. (2008). The four temperaments. Sophia Books.

Chicago Style (17th ed.) Citation

Steiner, Rudolf, and Matthew Barton. The Four Temperaments. Forest Row: Sophia Books, 2008.

MLA (9th ed.) Citation

Steiner, Rudolf, and Matthew Barton. The Four Temperaments. Sophia Books, 2008.