1. Politeness: Some Universals in Language Usage;Brown,1987
2. Contradictions of control: lessons from exploring teachers' work in Botswana;Davies;International Journal of Educational Development,1988
3. Language In Thought and Action;Hayakawa,1952
4. What's your name, Mpho?;Hilsdon,1993
5. Traditional and modern forms of address in isiZulu;Kumalo,1992