APA (7th ed.) Citation

Gurdjieff, G. I., Ketcham, C., Rosenthal, L., & Hartmann, T. d. (1999). Hymns, prayers, and rituals. Wergo.

Chicago Style (17th ed.) Citation

Gurdjieff, Georges Ivanovitch, Charles Ketcham, Laurence Rosenthal, and Thomas de Hartmann. Hymns, Prayers, and Rituals. Mainz, Germany: Wergo, 1999.

MLA (9th ed.) Citation

Gurdjieff, Georges Ivanovitch, et al. Hymns, Prayers, and Rituals. Wergo, 1999.