1. You don't touch lettuce with your fingers: Parental politeness in family discourse;Blum-Kulka;Journal of Pragmatics,1990
2. Linguistische Gesprächsanalyse;Brinker,1989
3. Gesprochenes Standarddeutsch. Telefondialoge;Brons-Albert,1984
4. Universals in language usage: Politeness phenomena;Brown,1978
5. Politeness: Some universals in language usage;Brown,1987