Singh, K. (2001). Building sustainable competitive strength.
Chicago-čujuhus (17. p.)Singh, Kamal. Building Sustainable Competitive Strength. New Delhi, 2001.
MLA-čujuhus (9. p.)Singh, Kamal. Building Sustainable Competitive Strength. 2001.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.