WGBH: Thousands of Massachusetts Uber, Lyft drivers move to form a union

Boston.com: Uber, Lyft drivers announce formation of new ‘App Drivers Union’

After ballot measure win, Uber and Lyft workers quickly launch ‘App Drivers Union’

Boston Globe: Uber, Lyft, drivers in Mass. win unionization rights, a first in the nation

Rideshare drivers in Massachusetts can unionize without being full-time employees