Template:Arnold, et al., 2019
- Arnold, Juliana Pille; Murphy, Mark V.; Didham, Raphael K.; Houston, Terry F. (26 February 2019). "Rediscovery of the 'extinct' bee Hesperocolletes douglasi Michener, 1965 (Colletidae: Colletinae: Paracolletini) in Western Australia and first description of the female". Journal of Threatened Taxa. 11 (3): 13310–13319. DOI: 10.11609/jott.4610.11.3.13310-13319.