TY  - BOOK
AU  - Lapan Stephen D Ed.
AU  -  Quartaroli Marylynn T Ed.
TI  - Research essentials: An introduction to designs and practices
SN  - 978-1-4129-4708-4
PY  - 2009///
CY  - Saint Paul, USA
PB  - Jossey- Bass Publishers
ER  -