Παραπομπή APA

Singh, R. (2012). One thousand plus questions on economic & social development: General studies for civil services examination: paper I. Mc Graw Hill.

Παραπομπή Chicago Style

Singh, Ramesh. One Thousand Plus Questions on Economic & Social Development: General Studies for Civil Services Examination: Paper I. New Delhi: Mc Graw Hill, 2012.

Παραπομπή MLA

Singh, Ramesh. One Thousand Plus Questions on Economic & Social Development: General Studies for Civil Services Examination: Paper I. Mc Graw Hill, 2012.