TY  - BOOK
AU  - Bogdan,Robert
AU  - Biklen,Sari Knopp,coaut
TI  - Qualitative research for education: an introduction to theory and methods 
SN  - 0-205-13266-9
AV  - LB1028 B63 1992
PY  - 1992///
CY  - Needham Heights, Ma.
PB  - Allyn and Bacon
N1  - Bibliografia : p. 244-258
ER  -