Singh ,B, & Singh ,A.P. (2011). General Studies 2012: IES &PSUS (6.). Made Easy Publications.
シカゴスタイル引用形Singh ,B, , Singh ,A.P. General Studies 2012: IES &PSUS. 6. New Delhi: Made Easy Publications, 2011.
MLA引用形式Singh ,B, , Singh ,A.P. General Studies 2012: IES &PSUS. 6. Made Easy Publications, 2011.
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