Hall, D. W., & Butler, J. F. . (2015). Spicebush Swallowtail Papilio (Pterourus) troilus Linnaeus 1758 (Insecta: Lepidoptera: Papilionidae: Papilioninae): EENY636/IN1107, 11/2015. EDIS, 2015(9), 11. https://doi.org/10.32473/edis-in1107-2015