Labor board confirms Amazon drivers are employees, in finding hailed by union Ars TechnicaNLRB says Amazon is a joint employer of some 3rd-party delivery drivers in California NPRTeamsters Win Groundbreaking Joint Employer Decision Against Amazon International Brotherhood of TeamstersUS labor regulator says Amazon is a joint employer of subcontracted delivery drivers in California The Associated PressDelivery drivers at third-party company in Palmdale are Amazon employees, NLRB finds Los Angeles Times