Krames, J. (2005). Jack Welch and the 4 E`s of leadership: How to put GE`s leadership formula work in your organization. Tata McGraw Hill.
Chicago-čujuhus (17. p.)Krames, Jeggrey. Jack Welch and the 4 E`s of Leadership: How to Put GE`s Leadership Formula Work in Your Organization. New Delhi: Tata McGraw Hill, 2005.
MLA-čujuhus (9. p.)Krames, Jeggrey. Jack Welch and the 4 E`s of Leadership: How to Put GE`s Leadership Formula Work in Your Organization. Tata McGraw Hill, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.