(1999). UPSC (IES) Engineering Services Examination Papers: Solved and Unsolved in General Studies. G.K.
استشهاد بنمط شيكاغوUPSC (IES) Engineering Services Examination Papers: Solved and Unsolved in General Studies. Jabalpur: G.K, 1999.
MLA استشهادUPSC (IES) Engineering Services Examination Papers: Solved and Unsolved in General Studies. G.K, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.