TY  - BOOK
AU  - Covey, Stephen R
TI  - The 7 habits of highly effective people
SN  - 978-0-7432-6951-3
U1  - 658.3045 
PY  - 2004///
CY  - Massachusetts: 
PB  - A Simon y Schuster Company, 
N1  - 2004
ER  -