COVEY STEPHEN R. (2013). THE 7 HABITS OF HIGHLY EFECTIVE PEOPLE. Simmon & Schuster.
Chicago Style aipamenaCOVEY STEPHEN R. THE 7 HABITS OF HIGHLY EFECTIVE PEOPLE. LONDON: Simmon & Schuster, 2013.
MLA aipamenaCOVEY STEPHEN R. THE 7 HABITS OF HIGHLY EFECTIVE PEOPLE. Simmon & Schuster, 2013.
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