1. Bilingualism as a World Problem;Mackey,1976
2. Life with Two Languages: An Introduction to Bilingualism;Grosjean,1982
3. Languages in Competition: Dominance, Diversity and Decline;Wardhaugh,1987
4. Canada—A Linguistic Profile,1989
5. Conflict and Compromise in Multilingual Societies: Switzerland;McRae,1983