TY  - GEN
AU  - Snyder, Melvin
TI  - Comparison of egotism, negativity and learned helpessness as explanations for poor performance after unsolvable problems
KW  - Depósito de Retaguarda
KW  - 0220 - Depósito de Retaguarda
UR  - https://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/dr.htm
ER  -