TY  - BOOK
AU  - Snijders T.A.B and Roel J bosken
TI  - Multilevel analysis and introduction to basic and advanced multilevel modelling 
SN  - 9781849202015
AV  - QA 278  .S65 2012 
PY  - 2012///
CY  - Los angeles
PB  - Sage
ER  -