Jacobson, R. S.; Matthews, R. W.; Macdonald, J. F. (1978-05-15). "A Systematic Study of the Vespula vulgaris Group with a Description of a New Yellowjacket Species in Eastern North America (Hymenoptera: Vespidae)1". Annals of the Entomological Society of America. 71 (3): 299–312. doi:10.1093/aesa/71.3.299. ISSN0013-8746.
Jacobson, R. S.; Matthews, R. W.; Macdonald, J. F. (1978-05-15). "A Systematic Study of the Vespula vulgaris Group with a Description of a New Yellowjacket Species in Eastern North America (Hymenoptera: Vespidae)1". Annals of the Entomological Society of America. 71 (3): 299–312. doi:10.1093/aesa/71.3.299. ISSN0013-8746.