Best, L. R., C. J. Marshall, and S. Red-Laird. “Confirmed Presence of the Squash Bee, Peponapis Pruinosa (Say, 1837) in the State of Oregon and Specimen-Based Observational Records of Peponapis (Say, 1837) (Hymenoptera: Anthophila) in the Oregon State Arthropod Collection”. Catalog: Oregon State Arthropod Collection, vol. 3, no. 3, June 2019, doi:10.5399/osu/cat_osac.3.3.4614.