APA-viite (7. p.)
NTPC. (2011). Electrical engineering executive trainees recruitment exam study guide. G.K.Publications.
Chicago-viite (17. p.)
NTPC. Electrical Engineering Executive Trainees Recruitment Exam Study Guide. Noida: G.K.Publications, 2011.
MLA-viite (9. p.)
NTPC. Electrical Engineering Executive Trainees Recruitment Exam Study Guide. G.K.Publications, 2011.
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