Castaneda, C. (1979). The second ring of power. Penguin Books.
Chicago-Zitierstil (17. Ausg.)Castaneda, Carlos. The Second Ring of Power. Harmondsworth: Penguin Books, 1979.
MLA-Zitierstil (8. Ausg.)Castaneda, Carlos. The Second Ring of Power. Penguin Books, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.