Competition Review. (2011). General Knowledge year book 2011. Competition Review Pvt. Ltd.
Chicago-čujuhus (17. p.)Competition Review. General Knowledge Year Book 2011. New Delhi: Competition Review Pvt. Ltd, 2011.
MLA-čujuhus (9. p.)Competition Review. General Knowledge Year Book 2011. Competition Review Pvt. Ltd, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.