COVEY STEPHEN R. (1999). LIVING THE 7 HABITS: STORIES OF COURAGE AND INSPIRATION. FIRESIDE BOOK.
Citazione stile Chigago Style (17a edizione)COVEY STEPHEN R. LIVING THE 7 HABITS: STORIES OF COURAGE AND INSPIRATION. NEW YORK: FIRESIDE BOOK, 1999.
Citatione MLA (9a ed.)COVEY STEPHEN R. LIVING THE 7 HABITS: STORIES OF COURAGE AND INSPIRATION. FIRESIDE BOOK, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.