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- COVEY, Stephen R. The 7 habits of highly effective people : personal workbook. London : Simon & Schuster, 2005. x, 178 s. ISBN 0-7432-6816-4. [Copy count : 1, currently available 1, at library only 0]
- COVEY, Stephen R. The 7 habits of highly effective people. London : Pocket Books, 2004. 372 s. ISBN 978-1-4165-0249-4. [Copy count : 2, currently available 2, at library only 0]