Singh, R. (2012). One thousand plus questions on economic & social development: General studies for civil services examination: paper I. Mc Graw Hill.
শিকাগো স্টাইলে সাইটেশনSingh, Ramesh. One Thousand Plus Questions on Economic & Social Development: General Studies for Civil Services Examination: Paper I. New Delhi: Mc Graw Hill, 2012.
এমএলএ সাইটেশনSingh, Ramesh. One Thousand Plus Questions on Economic & Social Development: General Studies for Civil Services Examination: Paper I. Mc Graw Hill, 2012.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.