APA (7th ed.) Citation

Petsche, J. J. M. (2014). Gurdjieff and music: The Gurdjieff/de Hartmann piano music and its esoteric significance. Aries book series.

Chicago Style (17th ed.) Citation

Petsche, Johanna J. M. "Gurdjieff and Music: The Gurdjieff/de Hartmann Piano Music and Its Esoteric Significance." Aries Book Series 2014.

MLA (8th ed.) Citation

Petsche, Johanna J. M. "Gurdjieff and Music: The Gurdjieff/de Hartmann Piano Music and Its Esoteric Significance." Aries Book Series, 2014.