HAGEL JOHN. (1999). NET GAIN. HARVARD BUSINESS SCHOOL.
Chicago-čujuhus (17. p.)HAGEL JOHN. NET GAIN. BOSTON: HARVARD BUSINESS SCHOOL, 1999.
MLA-čujuhus (9. p.)HAGEL JOHN. NET GAIN. HARVARD BUSINESS SCHOOL, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.