TY  - BOOK
AU  - Hattie, John A. C.
AU  - Hattie,John A.C.
TI  - Visible Learning: A synthesis of over 800 meta-analyses relating to achievement
SN  - 9780415476188
PY  - 2009///
CY  - New York
PB  - Routledge
KW  - e-learning
ER  -