A trade union is a representative or member organization of workers that exists to protect and advance the interests of working people. (Source: A Dictionary of Human Resource Management)
The following is not an exhaustive list of unions in Canada. A more comprehensive list can be found here.
Additionally, the Univeristy of Toronto's Industrial Relations & Human Resources Library has compiled a list of Canadian Labour Union Groups.
Collective bargaining is the process through which trade unions and employers negotiate collective agreements that set the rates of pay and terms and conditions of employment of workers. (Source: A Dictionary of Human Resource Management)
The following are a list of just some of the keywords you can use in article databases.
The following is a selection of just some of the books available at York University Libraries on the topics of unions and collective bargaining.