Cunningham, Scott. Cunningham's Encyclopedia of Magical Herbs. Llewellyn Publications, 2016.

Cunningham, Scott. Magical Aromatherapy: the Power of Scent. Llewellyn Pub., 2006.

Cunningham, Scott. Magical Herbalism: the Secret Craft of the Wise. Llewellyn Publications, 2003.

Grieve, M. A Modern Herbal: the Medicinal, Culinary, Cosmetic and Economic Properties, Cultivation and Folklore of Herbs, Grasses, Fungi, Shrubs and Trees with All Their Modern Scientific Uses. Tiger Books International, 1998.

“An Incredible Encyclopedia of Herbs with Everything about the Herbs.” Edited by Maureen Rogers, Herbalpedia, 2006,

Lawless, Julia. The Illustrated Encyclopedia of Essential Oils the Complete Guide to the Use of Oils in Aromatherapy and Herbalism. Element Books, 1995.

Tyler, Varro E., et al. The Complete German Commission e Monographs: Therapeutic Guide to Herbal Medicines. American Botanical Council, 1999.