1. What Do Cases Do? Some Notes on Activity in Sociological Analysis;Abbott,1992
2. Cases, Causes, Conjunctures, Stories, and Imagery;Becker,1992
3. Causal Inferences in Nonexperimental Research;Blalock,1964
4. An Introduction to Logic and Scientific Method;Cohen,1934
5. The New Language of Qualitative Method;Gubrium,1997