Root, A. I., Root, E., Shimanuki, H., Flottum, K., & Harman, A. (2007). The ABC & XYZ of bee culture: An encyclopedia pertaining to the scientific and practical culture of honey bees (41st edition, 1st printing.). Medina, Ohio: A.I. Root Company.

Root, Amos Ives, Ernest Root, Hachiro Shimanuki, Kim Flottum, and Ann Harman. The ABC & XYZ of Bee Culture: An Encyclopedia Pertaining to the Scientific and Practical Culture of Honey Bees. 41st edition, 1st printing. Medina, Ohio: A.I. Root Company, 2007.

Root, Amos Ives, et al. The ABC & XYZ of Bee Culture: An Encyclopedia Pertaining to the Scientific and Practical Culture of Honey Bees. 41st edition, 1st printing. Medina, Ohio: A.I. Root Company, 2007.