Singh, R. (2012). One thousand plus questions on economic & social development: General studies for civil services examination: paper I. Mc Graw Hill.
シカゴスタイル引用形Singh, Ramesh. One Thousand Plus Questions on Economic & Social Development: General Studies for Civil Services Examination: Paper I. New Delhi: Mc Graw Hill, 2012.
MLA引用形式Singh, Ramesh. One Thousand Plus Questions on Economic & Social Development: General Studies for Civil Services Examination: Paper I. Mc Graw Hill, 2012.
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