Tripodi, Amber D., and Allen L. Szalanski. “The Bumble Bees (Hymenoptera: Apidae: Bombus) of Arkansas, Fifty Years Later”. Journal of Melittology, no. 50 (June 1, 2015): 1–17. Accessed May 2, 2024. https://journals.ku.edu/melittology/article/view/4834.