1. Friendship: Developing a Sociological Perspective;Allan,1989
2. Friends of Friends: Networks, Manipulators and Coalitions;Boissevain,1974
3. Ethnographic fieldwork;Boissevain,1985
4. Family and Social Network;Bott,1957
5. The making and breaking of friendship as a standard frame in African folktales;Dundes,1971