Ponomareff, C. V., & Bryson, K. (2006). The curve of the sacred: An exploration of human spirituality. Rodopi.
Lua i Stíl Chicago (17ú heag.)Ponomareff, Constantin V., agus Ken Bryson. The Curve of the Sacred: An Exploration of Human Spirituality. Amsterdam ; New York, NY: Rodopi, 2006.
Lua MLA (9ú heag.)Ponomareff, Constantin V., agus Ken Bryson. The Curve of the Sacred: An Exploration of Human Spirituality. Rodopi, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.