(1989). Social studies textbooks: [Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Ontario, Prince Edward Island, Quebec, Saskatchewan].
Citazione stile Chigago Style (17a edizione)Social Studies Textbooks: [Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Ontario, Prince Edward Island, Quebec, Saskatchewan]. 1989.
Citatione MLA (9a ed.)Social Studies Textbooks: [Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Ontario, Prince Edward Island, Quebec, Saskatchewan]. 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.