Altman, Nathaniel (2000): . Inner Traditions / Bear & Company. ISBN 0-89281-836-0 Buchman, Dian Dincin (2001): The complete book of water healing. 2. utg., McGraw-Hill Professional. ISBN 0-658-01378-5 Crebbin-Bailey, Jane; Harcup, John W.; Harrington, John (2005): . Cengage Learning EMEA. ISBN 1-86152-917-1 Dvorjetski, Esti (2007): , Brill, (illustrert). ISBN 90-04-15681-X Chambers, Thomas (2002): . Smithsonian Institution Press.