Hall, D. W., and J. F. Butler. “Zebra Swallowtail Protographium Marcellus (Cramer) (Insecta: Lepidoptera: Papilionidae): EENY-059/IN215, Rev. 5/2020”. EDIS, vol. 2021, no. 2, Apr. 2021, p. 8, doi:10.32473/edis-in215-2020.