TY  - BOOK
AU  - Covey,Stephen R
TI  - The seven habits of highly effective people: restoring the character ethic 
SN  - 0671663984 :
AV  - BF 637.S8 C68.1989
PY  - 1989///
CY  - New York
PB  - Simon and Schuster
KW  - Éxito
KW  - Aspectos psicológicos
ER  -