Campbell, D., & Cayce, C. T. (1989). Edgar Cayce on the power of color, stones, and crystals (Warner Books edition.). Warner Books.
Dyfyniad Arddull ChicagoCampbell, Dan, and Charles Thomas Cayce. Edgar Cayce on the Power of Color, Stones, and Crystals. Warner Books edition. New York: Warner Books, 1989.
Dyfyniad MLACampbell, Dan, and Charles Thomas Cayce. Edgar Cayce on the Power of Color, Stones, and Crystals. Warner Books edition. Warner Books, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.