(en) Josie M. Rudolphi, Shelly Campo, Fred Gerr et Diane S. Rohlman, « Social and Individual Influences on Tractor Operating Practices of Young Adult Agricultural Workers », Journal of Adolescent Health, vol. 62, no 5, , p. 605–611 (ISSN1054-139X, PMID29478719, DOI10.1016/j.jadohealth.2017.11.300).
(en) Josie M. Rudolphi, Shelly Campo, Fred Gerr et Diane S. Rohlman, « Social and Individual Influences on Tractor Operating Practices of Young Adult Agricultural Workers », Journal of Adolescent Health, vol. 62, no 5, , p. 605–611 (ISSN1054-139X, PMID29478719, DOI10.1016/j.jadohealth.2017.11.300).
(en) Josie M. Rudolphi, Shelly Campo, Fred Gerr et Diane S. Rohlman, « Social and Individual Influences on Tractor Operating Practices of Young Adult Agricultural Workers », Journal of Adolescent Health, vol. 62, no 5, , p. 605–611 (ISSN1054-139X, PMID29478719, DOI10.1016/j.jadohealth.2017.11.300).