APA-čujuhus (7. p.)
NTPC. (2011). Electrical engineering executive trainees recruitment exam study guide. G.K.Publications.
Chicago-čujuhus (17. p.)
NTPC. Electrical Engineering Executive Trainees Recruitment Exam Study Guide. Noida: G.K.Publications, 2011.
MLA-čujuhus (9. p.)
NTPC. Electrical Engineering Executive Trainees Recruitment Exam Study Guide. G.K.Publications, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.