Sachdeva, s. (2010). General knowledge yearbook 2010. Competition Review pvt. Ltd.
Cita Chicago (17th ed.)Sachdeva, surendrakumar. General Knowledge Yearbook 2010. Delhi: Competition Review pvt. Ltd, 2010.
Cita MLA (9th ed.)Sachdeva, surendrakumar. General Knowledge Yearbook 2010. Competition Review pvt. Ltd, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.