Christensen, Clayton M. (1952-2020). (ang.) How will you measure your life? ( w 0 rekordach )

1. How will you measure your life? / Clayton M. Christensen, James Allworth, and Karen Dillon. - New York, cop. 2012.

1. Christensen, Clayton M. (1952-2020). (ang.) How will you measure your life?