TY  - BOOK
AU  - Ball, Samuel
TI  - Motivation in education
PY  - 1977///
CY  - New York
PB  - Academic Press
KW  - Psicologia Educacional
KW  - 3500 - Psicologia Educacional
UR  - https://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/e2.htm
ER  -